port: fix aEnvMixer; fix some misc warnings

hopefully that was the last of the big audio issues

include/PR/libaudio.h

@@ -120,7 +120,11 @@ typedef struct ALLink_s {
 void    alUnlink(ALLink *element);
 void    alLink(ALLink *element, ALLink *after);
 
+#ifdef PLATFORM_N64
 typedef s32 (*ALDMAproc)(s32 addr, s32 len, void *state);
+#else
+typedef uintptr_t (*ALDMAproc)(uintptr_t addr, s32 len, void *state);
+#endif
 typedef ALDMAproc (*ALDMANew)(void *state);
 
 void    alCopy(void *src, void *dest, s32 len);

include/PR/os_convert.h

@@ -97,9 +97,13 @@ extern "C" {
 
 /* Address translation routines and macros */
 
+#ifdef PLATFORM_N64
 extern u32		 osVirtualToPhysical(void *);
 extern void *		 osPhysicalToVirtual(u32);
-
+#else
+extern uintptr_t	osVirtualToPhysical(void *);
+extern void *		 osPhysicalToVirtual(uintptr_t);
+#endif
 
 #endif  /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */