msvfw32: Remove unneeded casts.

dlls/msvfw32/msvideo16.c

@@ -693,7 +693,7 @@ static  LRESULT CALLBACK  IC_Callback3216(HIC hic, HDRVR hdrv, UINT msg, DWORD l
         args[2] = LOWORD(lp1);
         args[1] = HIWORD(lp2);
         args[0] = LOWORD(lp2);
-        WOWCallback16Ex( (DWORD)whic->driverproc16, WCB16_PASCAL, sizeof(args), args, &ret );
+        WOWCallback16Ex( whic->driverproc16, WCB16_PASCAL, sizeof(args), args, &ret );
 
         switch (msg)
         {
@@ -745,7 +745,7 @@ LRESULT VFWAPI ICSendMessage16(HIC16 hic, UINT16 msg, DWORD lParam1, DWORD lPara
             args[2] = LOWORD(lParam1);
             args[1] = HIWORD(lParam2);
             args[0] = LOWORD(lParam2);
-            WOWCallback16Ex( (DWORD)whic->driverproc16, WCB16_PASCAL, sizeof(args), args, &result );
+            WOWCallback16Ex( whic->driverproc16, WCB16_PASCAL, sizeof(args), args, &result );
             ret = result;
         }
         else

dlls/msvfw32/msvideo_main.c

@@ -327,7 +327,7 @@ HIC VFWAPI ICOpen(DWORD fccType, DWORD fccHandler, UINT wMode)
 
     if (driver && driver->proc)
 	/* The driver has been registered at runtime with its driverproc */
-        return MSVIDEO_OpenFunction(fccType, fccHandler, wMode, (DRIVERPROC)driver->proc, (DWORD)NULL);
+        return MSVIDEO_OpenFunction(fccType, fccHandler, wMode, driver->proc, 0);
   
     /* Well, lParam2 is in fact a LPVIDEO_OPEN_PARMS, but it has the
      * same layout as ICOPEN