regexec: do index arithmetic/comparison in unsigned mode #23762
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Otherwise gcc warns when building:
In file included from perl.h:4229,
from regexec.c:76:
regexec.c: In function ‘S_isWB’:
regexec.c:6276:28: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
6276 | assert(index+1 < C_ARRAY_LENGTH(WB_dfa_table));
| ^
Fixes Perl#23760.
khwilliamson
approved these changes
Sep 23, 2025
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Otherwise gcc warns when building:
Fixes #23760.