Missing include in unicode_support.c results in compiler warning

[ak-slongchamps]

Repro

Compile the library using MSVC 2019, see warning:

libopusenc\src\unicode_support.c(44,56): warning C4312: 'type cast': conversion from 'int' to 'wchar_t *' of greater size

Solution

The malloc function is used without including its definition. Including "stdlib.h" results in no warning.