winemac: Use RTL_CONSTANT_STRING.

dlls/winemac.drv/clipboard.c

@@ -1665,8 +1665,7 @@ void macdrv_UpdateClipboard(void)
 
     if (!NtUserIsWindow(clipboard_manager))
     {
-        UNICODE_STRING str;
-        RtlInitUnicodeString(&str, clipboard_classname);
+        UNICODE_STRING str = RTL_CONSTANT_STRING(clipboard_classname);
         clipboard_manager = NtUserFindWindowEx(NULL, NULL, &str, NULL, 0);
         if (!clipboard_manager)
         {

dlls/winemac.drv/display.c

@@ -149,7 +149,7 @@ static BOOL write_display_settings(HKEY parent_hkey, CGDirectDisplayID displayID
     char display_key_name[19];
     HKEY display_hkey;
     CGDisplayModeRef display_mode;
-    UNICODE_STRING str;
+    UNICODE_STRING str = RTL_CONSTANT_STRING(pixelencodingW);
     DWORD val;
     CFStringRef pixel_encoding;
     size_t len;
@@ -189,7 +189,6 @@ static BOOL write_display_settings(HKEY parent_hkey, CGDirectDisplayID displayID
     CFStringGetCharacters(pixel_encoding, CFRangeMake(0, len), (UniChar*)buf);
     buf[len] = 0;
     CFRelease(pixel_encoding);
-    RtlInitUnicodeString(&str, pixelencodingW);
     if (NtSetValueKey(display_hkey, &str, 0, REG_SZ, (const BYTE*)buf, (len + 1) * sizeof(WCHAR)))
         goto fail;