Fix some pedantic warnings when compiling with GCC.

CHANGES.md

 v0.11.12 - TBD
 =====================
+* Fix some pedantic warnings when compiling with GCC.
 * A safety change for custom VFS implementations. The `pBytesRead` parameter on the onRead callback is now pre-initialized to zero.
 
 

miniaudio.h

@@ -3799,7 +3799,18 @@ typedef double      ma_double;
 
 typedef void* ma_handle;
 typedef void* ma_ptr;
+
+/*
+ma_proc is annoying because when compiling with GCC we get pendantic warnings about converting
+between `void*` and `void (*)()`. We can't use `void (*)()` with MSVC however, because we'll get
+warning C4191 about "type cast between incompatible function types". To work around this I'm going
+to use a different data type depending on the compiler.
+*/
+#if defined(__GNUC__)
+typedef void (*ma_proc)(void);
+#else
 typedef void* ma_proc;
+#endif
 
 #if defined(_MSC_VER) && !defined(_WCHAR_T_DEFINED)
 typedef ma_uint16 wchar_t;