grass7 @7.8.7: ISO C99 and later do not support implicit int

[ryandesign (Ryan Carsten Schmidt)]

grass7 fails to build with newer compilers like clang 16:

​https://build.macports.org/builders/ports-10.8_x86_64-builder/builds/141432/steps/install-port/logs/stdio

main.c:1688:17: error: parameter 'imin' was not declared, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
void cube(jmin, imin)
                ^
main.c:1688:11: error: parameter 'jmin' was not declared, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
void cube(jmin, imin)
          ^
main.c:1688:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
void cube(jmin, imin)
     ^
1 warning and 2 errors generated.

[ryandesign (Ryan Carsten Schmidt)]

Upstream fixed it this way in version 8:

​https://github.com/OSGeo/grass/commit/594c947ce8984f07faf28d7d71e4c902f4532069

[nilason (Nicklas Larsson)]

In 2680dad6cbe0bf57a6c099510dc87a02440624a7/macports-ports (master):

grass7: fix invalid implicit int

Implicit int (-Wimplicit-int) is considered an error with Clang 16+.
Backport of ​https://github.com/OSGeo/grass/commit/594c947ce8984f07faf28d7d71e4c902f4532069.

Closes #67791

[nilason (Nicklas Larsson)]

Thanks Ryan for the heads-up!