Remove (POINTER)NULL casts.

diff --git a/dlls/msacm/internal.c b/dlls/msacm/internal.c
index 7d6c8f0..5d41368 100644
--- a/dlls/msacm/internal.c
+++ b/dlls/msacm/internal.c
@@ -39,7 +39,7 @@
 
 /**********************************************************************/
 
-HANDLE MSACM_hHeap = (HANDLE) NULL;
+HANDLE MSACM_hHeap = NULL;
 PWINE_ACMDRIVERID MSACM_pFirstACMDriverID = NULL;
 PWINE_ACMDRIVERID MSACM_pLastACMDriverID = NULL;
 
diff --git a/dlls/msacm/msacm32_main.c b/dlls/msacm/msacm32_main.c
index 6b7b39b..82317dc7 100644
--- a/dlls/msacm/msacm32_main.c
+++ b/dlls/msacm/msacm32_main.c
@@ -51,7 +51,7 @@
     case DLL_PROCESS_DETACH:
         MSACM_UnregisterAllDrivers();
         HeapDestroy(MSACM_hHeap);
-        MSACM_hHeap = (HANDLE)NULL;
+        MSACM_hHeap = NULL;
         MSACM_hInstance32 = NULL;
 	break;
     case DLL_THREAD_ATTACH: