mux: mpeg: guarantee non-overflow in the function
Fixes the bunch of warnings:
In file included from ../../modules/mux/mpeg/tables.c:44:
In function ‘bits_write’,
inlined from ‘GetPMTmpeg4’ at ../../modules/mux/mpeg/tables.c:220:9,
inlined from ‘BuildPMT’ at ../../modules/mux/mpeg/tables.c:478:13:
../../modules/mux/mpeg/bits.h:69:48: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
69 | p_buffer->p_data[p_buffer->i_data] |= p_buffer->i_mask;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
../../modules/mux/mpeg/tables.c: In function ‘BuildPMT’:
../../modules/mux/mpeg/tables.c:181:13: note: at offset 4096 into destination object ‘iod’ of size 4096
181 | uint8_t iod[4096];
| ^~~
In function ‘bits_write’,
inlined from ‘GetPMTmpeg4’ at ../../modules/mux/mpeg/tables.c:220:9,
inlined from ‘BuildPMT’ at ../../modules/mux/mpeg/tables.c:478:13:
../../modules/mux/mpeg/bits.h:69:48: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
69 | p_buffer->p_data[p_buffer->i_data] |= p_buffer->i_mask;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
../../modules/mux/mpeg/tables.c: In function ‘BuildPMT’:
../../modules/mux/mpeg/tables.c:181:13: note: at offset 4096 into destination object ‘iod’ of size 4096
181 | uint8_t iod[4096];
| ^~~
...