fix: dibit shouldn't fail when m is zero

[MegaRedHand]

Closes: #1245

Description

This PR fixes a check in the n_pair_bits function called from the dibit hint that was only correct for the quad_bit hint.

Checklist

• Linked to Github Issue
• Unit tests added
• Integration tests added.
• This change requires new documentation.
  • Documentation has been added/updated.
  • CHANGELOG has been updated.

[codecov]

Codecov Report

Merging #1247 (2a9626f) into main (8a72ddc) will increase coverage by 0.00%.
The diff coverage is 95.65%.

@@           Coverage Diff           @@
##             main    #1247   +/-   ##
=======================================
  Coverage   97.59%   97.59%           
=======================================
  Files          89       89           
  Lines       36138    36152   +14     
=======================================
+ Hits        35268    35282   +14     
  Misses        870      870           

Impacted Files	Coverage Δ
..._processor/builtin_hint_processor/secp/ec_utils.rs	99.54% <95.65%> (+<0.01%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[github-actions]

Benchmark Results for unmodified programs 🚀

Command	Mean [s]	Min [s]	Max [s]	Relative
base blake2s_integration_benchmark	10.947 ± 0.063	10.844	11.038	1.00
head blake2s_integration_benchmark	10.958 ± 0.058	10.893	11.079	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base compare_arrays_200000	3.853 ± 0.039	3.811	3.927	1.00
head compare_arrays_200000	3.883 ± 0.073	3.833	4.046	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base dict_integration_benchmark	2.563 ± 0.034	2.534	2.634	1.01 ± 0.01
head dict_integration_benchmark	2.542 ± 0.011	2.528	2.563	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base factorial_multirun	4.073 ± 0.030	4.045	4.134	1.00
head factorial_multirun	4.083 ± 0.016	4.057	4.108	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base fibonacci_1000_multirun	3.405 ± 0.015	3.387	3.430	1.00
head fibonacci_1000_multirun	3.416 ± 0.046	3.390	3.543	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base field_arithmetic_get_square_benchmark	1.918 ± 0.021	1.901	1.971	1.00 ± 0.01
head field_arithmetic_get_square_benchmark	1.914 ± 0.010	1.902	1.936	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base integration_builtins	9.757 ± 0.143	9.588	10.029	1.00 ± 0.04
head integration_builtins	9.737 ± 0.317	9.512	10.621	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base keccak_integration_benchmark	11.137 ± 0.212	10.934	11.532	1.01 ± 0.02
head keccak_integration_benchmark	10.996 ± 0.092	10.884	11.172	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base linear_search	3.885 ± 0.086	3.834	4.120	1.01 ± 0.02
head linear_search	3.836 ± 0.017	3.813	3.865	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base math_cmp_and_pow_integration_benchmark	2.780 ± 0.020	2.759	2.816	1.01 ± 0.01
head math_cmp_and_pow_integration_benchmark	2.763 ± 0.007	2.755	2.782	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base math_integration_benchmark	2.531 ± 0.035	2.508	2.628	1.01 ± 0.01
head math_integration_benchmark	2.514 ± 0.008	2.506	2.528	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base memory_integration_benchmark	2.223 ± 0.010	2.211	2.241	1.00
head memory_integration_benchmark	2.225 ± 0.012	2.212	2.253	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base operations_with_data_structures_benchmarks	2.492 ± 0.008	2.476	2.502	1.00
head operations_with_data_structures_benchmarks	2.495 ± 0.020	2.476	2.543	1.00 ± 0.01

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
base pedersen	871.6 ± 1.7	869.5	874.9	1.00
head pedersen	872.5 ± 2.1	869.8	876.3	1.00 ± 0.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base poseidon_integration_benchmark	1.543 ± 0.008	1.533	1.553	1.00 ± 0.01
head poseidon_integration_benchmark	1.540 ± 0.007	1.531	1.555	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base secp_integration_benchmark	2.965 ± 0.016	2.939	3.003	1.01 ± 0.01
head secp_integration_benchmark	2.941 ± 0.009	2.931	2.960	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base set_integration_benchmark	1.658 ± 0.025	1.635	1.726	1.00 ± 0.02
head set_integration_benchmark	1.650 ± 0.003	1.647	1.654	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base uint256_integration_benchmark	7.025 ± 0.033	6.995	7.109	1.00 ± 0.01
head uint256_integration_benchmark	7.006 ± 0.011	6.994	7.029	1.00