Fixed 3 memset()s which used the wrong size (too large).

dlls/ddraw/ddraw/hal.c

@@ -114,7 +114,7 @@ static BOOL WINAPI set_hal_info(LPDDHALINFO lpDDHalInfo, BOOL reset)
     if (lpDDHalInfo->lpD3DHALCallbacks)
 	memcpy(&d3d_hal_cbs1, (LPVOID)lpDDHalInfo->lpD3DHALCallbacks, sizeof(D3DHAL_CALLBACKS));
     else
-	memset(&d3d_hal_cbs1, 0, sizeof(D3DDEVICEDESC_V1));
+	memset(&d3d_hal_cbs1, 0, sizeof(D3DHAL_CALLBACKS));
     dd_gbl.lpD3DHALCallbacks	 = (ULONG_PTR)&d3d_hal_cbs1;
 
     if (lpDDHalInfo->dwFlags & DDHALINFO_GETDRIVERINFOSET) {

dlls/dinput/device.c

@@ -409,7 +409,7 @@ BOOL DIEnumDevicesCallbackAtoW(LPCDIDEVICEOBJECTINSTANCEA lpddi, LPVOID lpvRef)
 
     data = (device_enumobjects_AtoWcb_data*) lpvRef;
     
-    memset(&ddtmp, 0, sizeof(DIDEVICEINSTANCEW)); 
+    memset(&ddtmp, 0, sizeof(ddtmp));
     
     ddtmp.dwSize = sizeof(DIDEVICEINSTANCEW);
     ddtmp.guidType     = lpddi->guidType;

dlls/msacm/tests/msacm.c

@@ -265,7 +265,7 @@ static BOOL CALLBACK DriverEnumProc(HACMDRIVERID hadid,
                 rc, MMSYSERR_INVALPARAM);
 
             /* try bad structure size */
-            ZeroMemory(&aftd, sizeof(fd));
+            ZeroMemory(&aftd, sizeof(aftd));
             rc = acmFormatTagEnum(had, &aftd, FormatTagEnumProc, 0, 0);
             ok(rc == MMSYSERR_INVALPARAM,
                "acmFormatTagEnum(): rc = %08x, should be %08x\n",