dnsapi: Use the global HeapAlloc() wrappers.

dlls/dnsapi/dnsapi.h

@@ -22,20 +22,7 @@
 # error You must include config.h to use this header
 #endif
 
-static inline void* __WINE_ALLOC_SIZE(1) heap_alloc(size_t size)
-{
-    return HeapAlloc(GetProcessHeap(), 0, size);
-}
-
-static inline void* __WINE_ALLOC_SIZE(1) heap_alloc_zero(size_t size)
-{
-    return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
-}
-
-static inline BOOL heap_free(void *mem)
-{
-    return HeapFree(GetProcessHeap(), 0, mem);
-}
+#include "wine/heap.h"
 
 static inline LPSTR dns_strdup_a( LPCSTR src )
 {