vclog: fix max realloc compiler error

[heitbaum]

• Fixes #87

./vclog/vclog.c:211:34: error: argument 2 value '4294967288' exceeds maximum object size 2147483647 [-Werror=alloc-size-larger-than=] 211 | payload_buffer = realloc(payload_buffer, payload_buffer_size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ./vclog/vclog.c:17: ../../toolchain/armv7ve-libreelec-linux-gnueabihf/sysroot/usr/include/stdlib.h:683:14: note: in a call to allocation function 'realloc' declared here 683 | extern void *realloc (void *__ptr, size_t __size) | ^~~~~~~