Fix decode for u16/u32

[xunilrj]

Description

This PR fixes a problem when decoding u16 and u32.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[github-actions]

Benchmark for 3ecc242

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Test	Base	PR	%
code_action	5.4±0.12ms	5.4±0.08ms	0.00%
code_lens	335.1±10.20ns	294.5±8.12ns	-12.12%
compile	6.3±0.06s	6.2±0.16s	-1.59%
completion	4.9±0.03ms	4.9±0.07ms	0.00%
did_change_with_caching	5.7±0.11s	5.8±0.12s	+1.75%
document_symbol	1000.7±43.23µs	942.8±18.36µs	-5.79%
format	72.3±0.94ms	73.5±1.31ms	+1.66%
goto_definition	360.6±5.70µs	371.6±23.48µs	+3.05%
highlight	9.0±0.14ms	9.1±0.22ms	+1.11%
hover	590.8±10.06µs	603.3±19.41µs	+2.12%
idents_at_position	121.5±0.33µs	123.0±0.80µs	+1.23%
inlay_hints	664.5±15.76µs	683.6±31.20µs	+2.87%
on_enter	489.1±6.73ns	487.5±26.57ns	-0.33%
parent_decl_at_position	3.7±0.03ms	3.7±0.03ms	0.00%
prepare_rename	391.3±4.11µs	365.0±10.45µs	-6.72%
rename	9.7±0.19ms	9.6±0.21ms	-1.03%
semantic_tokens	1061.7±24.43µs	1049.1±37.19µs	-1.19%
token_at_position	355.5±2.72µs	365.4±3.39µs	+2.78%
tokens_at_position	3.7±0.02ms	3.7±0.04ms	0.00%
tokens_for_file	412.3±6.50µs	418.7±3.02µs	+1.55%
traverse	47.4±2.07ms	44.9±1.50ms	-5.27%

[github-actions]

Benchmark for 7ea6394

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Test	Base	PR	%
code_action	5.4±0.03ms	5.4±0.12ms	0.00%
code_lens	289.6±7.90ns	290.4±8.96ns	+0.28%
compile	6.0±0.13s	6.2±0.08s	+3.33%
completion	4.9±0.11ms	5.1±0.09ms	+4.08%
did_change_with_caching	5.6±0.05s	5.7±0.08s	+1.79%
document_symbol	1089.6±35.05µs	966.7±16.58µs	-11.28%
format	70.3±0.64ms	70.1±0.47ms	-0.28%
goto_definition	376.3±14.92µs	373.5±6.96µs	-0.74%
highlight	9.1±0.03ms	9.2±0.15ms	+1.10%
hover	608.4±23.26µs	604.9±11.28µs	-0.58%
idents_at_position	122.6±0.61µs	121.9±1.04µs	-0.57%
inlay_hints	666.2±7.26µs	673.0±8.82µs	+1.02%
on_enter	493.8±7.92ns	494.9±14.17ns	+0.22%
parent_decl_at_position	3.8±0.02ms	3.8±0.02ms	0.00%
prepare_rename	378.7±7.01µs	374.0±8.82µs	-1.24%
rename	9.6±0.16ms	9.6±0.08ms	0.00%
semantic_tokens	1053.1±25.29µs	1052.4±15.97µs	-0.07%
token_at_position	371.5±3.64µs	367.7±2.26µs	-1.02%
tokens_at_position	3.7±0.03ms	3.8±0.13ms	+2.70%
tokens_for_file	432.9±29.92µs	422.8±3.41µs	-2.33%
traverse	43.8±1.04ms	45.1±2.67ms	+2.97%

[github-actions]

Benchmark for 0b0a3e6

Click to view benchmark

Test	Base	PR	%
code_action	5.4±0.04ms	5.4±0.11ms	0.00%
code_lens	289.6±7.59ns	292.7±6.99ns	+1.07%
compile	6.0±0.07s	6.1±0.11s	+1.67%
completion	4.9±0.02ms	5.0±0.12ms	+2.04%
did_change_with_caching	5.5±0.11s	5.6±0.05s	+1.82%
document_symbol	1043.5±35.19µs	952.5±30.47µs	-8.72%
format	71.0±2.17ms	74.6±1.28ms	+5.07%
goto_definition	372.5±28.89µs	360.5±5.77µs	-3.22%
highlight	9.1±0.02ms	9.2±0.59ms	+1.10%
hover	595.9±16.15µs	647.4±20.70µs	+8.64%
idents_at_position	122.3±0.21µs	123.7±2.74µs	+1.14%
inlay_hints	661.5±19.57µs	674.1±23.24µs	+1.90%
on_enter	474.2±17.04ns	473.6±18.51ns	-0.13%
parent_decl_at_position	3.8±0.03ms	3.7±0.05ms	-2.63%
prepare_rename	367.7±12.63µs	367.3±7.79µs	-0.11%
rename	9.6±0.24ms	9.6±0.03ms	0.00%
semantic_tokens	1040.0±15.93µs	1040.3±15.53µs	+0.03%
token_at_position	360.7±3.01µs	363.1±2.23µs	+0.67%
tokens_at_position	3.8±0.06ms	3.7±0.05ms	-2.63%
tokens_for_file	421.3±4.21µs	430.9±3.23µs	+2.28%
traverse	43.6±1.47ms	43.7±1.56ms	+0.23%

[github-actions]

Benchmark for e60d6aa

Click to view benchmark

Test	Base	PR	%
code_action	6.2±0.28ms	5.5±0.22ms	-11.29%
code_lens	290.0±8.44ns	290.6±13.61ns	+0.21%
compile	6.3±0.15s	6.3±0.13s	0.00%
completion	5.1±0.25ms	5.6±0.64ms	+9.80%
did_change_with_caching	5.7±0.07s	6.3±0.20s	+10.53%
document_symbol	1035.9±32.33µs	961.9±26.09µs	-7.14%
format	72.9±1.30ms	70.4±1.68ms	-3.43%
goto_definition	373.2±11.77µs	358.5±6.81µs	-3.94%
highlight	9.2±0.20ms	9.1±0.18ms	-1.09%
hover	599.6±20.27µs	675.4±18.90µs	+12.64%
idents_at_position	123.6±0.52µs	123.9±1.46µs	+0.24%
inlay_hints	679.1±17.12µs	666.5±20.11µs	-1.86%
on_enter	474.6±13.73ns	472.0±13.37ns	-0.55%
parent_decl_at_position	3.8±0.04ms	3.8±0.07ms	0.00%
prepare_rename	375.4±10.37µs	354.7±7.12µs	-5.51%
rename	9.9±0.23ms	9.7±0.19ms	-2.02%
semantic_tokens	1066.8±17.46µs	1049.1±23.95µs	-1.66%
token_at_position	365.1±4.77µs	356.9±5.03µs	-2.25%
tokens_at_position	3.8±0.14ms	3.9±0.19ms	+2.63%
tokens_for_file	422.3±6.26µs	416.1±3.27µs	-1.47%
traverse	46.0±1.75ms	47.0±2.30ms	+2.17%

[github-actions]

Benchmark for f42c52a

Click to view benchmark

Test	Base	PR	%
code_action	5.4±0.03ms	5.5±0.07ms	+1.85%
code_lens	289.7±7.57ns	287.6±8.41ns	-0.72%
compile	6.0±0.07s	6.4±0.08s	+6.67%
completion	5.0±0.20ms	5.2±0.19ms	+4.00%
did_change_with_caching	5.5±0.05s	5.7±0.04s	+3.64%
document_symbol	999.6±41.78µs	965.2±19.68µs	-3.44%
format	69.3±0.75ms	70.1±1.30ms	+1.15%
goto_definition	369.1±7.45µs	368.5±6.95µs	-0.16%
highlight	9.1±0.18ms	9.2±0.15ms	+1.10%
hover	604.8±19.96µs	689.6±20.44µs	+14.02%
idents_at_position	122.2±0.36µs	122.4±1.31µs	+0.16%
inlay_hints	668.9±10.43µs	671.9±9.77µs	+0.45%
on_enter	467.7±18.48ns	467.0±17.53ns	-0.15%
parent_decl_at_position	3.7±0.03ms	3.8±0.06ms	+2.70%
prepare_rename	369.9±9.66µs	365.8±9.46µs	-1.11%
rename	9.5±0.15ms	9.7±0.11ms	+2.11%
semantic_tokens	1062.3±39.63µs	1067.0±58.29µs	+0.44%
token_at_position	363.4±2.10µs	363.7±2.49µs	+0.08%
tokens_at_position	3.7±0.07ms	3.7±0.05ms	0.00%
tokens_for_file	421.3±2.21µs	417.2±3.24µs	-0.97%
traverse	44.4±1.82ms	45.9±1.78ms	+3.38%