user32: Fix Win64 warnings.

dlls/user32/exticon.c

@@ -259,7 +259,7 @@ static BOOL CALLBACK extract_icons_callback(HMODULE hModule, LPCWSTR pwszType, L
     LONG_PTR lParam) 
 {
     struct extract_icons_state *pState = (struct extract_icons_state *)lParam;
-    INT idCurrent = (INT)pwszName;
+    INT idCurrent = LOWORD(pwszName);
 
     /* If the handle array pointer is NULL, we just count the number of icons in the module. */
     if (!pState->pahIcon) {

dlls/user32/listbox.c

@@ -2607,7 +2607,7 @@ static LRESULT WINAPI ListBoxWndProc_common( HWND hwnd, UINT msg,
 	    CREATESTRUCTW *lpcs = (CREATESTRUCTW *)lParam;
 	    if (lpcs->style & LBS_COMBOBOX) lphc = (LPHEADCOMBO)lpcs->lpCreateParams;
             if (!LISTBOX_Create( hwnd, lphc )) return -1;
-            TRACE("creating wnd=%p descr=%x\n", hwnd, GetWindowLongPtrW( hwnd, 0 ) );
+            TRACE("creating hwnd %p descr %p\n", hwnd, (void *)GetWindowLongPtrW( hwnd, 0 ) );
             return 0;
         }
         /* Ignore all other messages before we get a WM_CREATE */

dlls/user32/sysparams.c

@@ -2110,7 +2110,7 @@ BOOL WINAPI SystemParametersInfoW( UINT uiAction, UINT uiParam,
     case SPI_SETMOUSESPEED:                     /*    113  _WIN32_WINNT >= 0x500 || _WIN32_WINDOW > 0x400 */
     {
         ret = save_int_param( SPI_SETMOUSE_REGKEY, SPI_SETMOUSE_VALNAME3,
-                              &mouse_speed, (INT) pvParam, fWinIni);
+                              &mouse_speed, PtrToInt(pvParam), fWinIni);
 
         break;
     }