Support of old C89 standard

[mikir]

Not sure if support of old C89 standard has been cancelled but if this is not that case, the last release has introduced some small violations in modules pcre2_compile.c and pcre2_script_run.c. Examples:

pcre2_compile.c: In function 'compile_branch':
pcre2_compile.c:5857:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for (int i = 0; i < 32; i++) pbits[i] |= cbits[(int)i + taboffset];
             ^
pcre2_compile.c:5857:13: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
pcre2_compile.c:5859:22: error: redefinition of 'i'
             for (int i = 0; i < 32; i++) pbits[i] &= ~cbits[(int)i + taboffset];
                      ^
pcre2_compile.c:5857:22: note: previous definition of 'i' was here
             for (int i = 0; i < 32; i++) pbits[i] |= cbits[(int)i + taboffset];
                      ^
pcre2_compile.c:5859:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for (int i = 0; i < 32; i++) pbits[i] &= ~cbits[(int)i + taboffset];
             ^

pcre2_script_run.c: In function '_pcre2_script_run_8':
pcre2_script_run.c:109:1: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
 for (int i = 0; i < FULL_MAPSIZE; i++) require_map[i] = 0;
 ^
pcre2_script_run.c:109:1: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
pcre2_script_run.c:248:7: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
       for (int i = 0; i < FULL_MAPSIZE; i++)
       ^
pcre2_script_run.c:285:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int i = 0; i < FULL_MAPSIZE; i++) require_map[i] &= map[i];

Please consider to change it. Or feel free to close it without any actions if C89 violations are not an issue any more.

[PhilipHazel]

Declarations in "for" statements are in C99, so have been standardized for over 20 years. I am happy to move to C99, unless there are very strong objections.

[mikir]

OK, I see. No objections. :-)