build issue seen on CentOS7 and Aarch64 machine
Fixes:
../../vlc-3.0.9.2/src/misc/fourcc_gen.c:75:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
| for (size_t i = 0; i < n; i++)
| ^
| ../../vlc-3.0.9.2/src/misc/fourcc_gen.c:75:5: note: use option -std=c99 or -std=gnu99 to compile your code
Signed-off-by: Armin Kuster <akuster808@gmail.com>