win32u: Use RtlInitUnicodeString from ntdll.so.

dlls/win32u/driver.c

@@ -215,7 +215,7 @@ static INT CDECL nulldrv_GetDeviceCaps( PHYSDEV dev, INT cap )
             dc = get_nulldrv_dc( dev );
             memset( &devmode, 0, sizeof(devmode) );
             devmode.dmSize = sizeof(devmode);
-            init_unicode_string( &display, dc->display );
+            RtlInitUnicodeString( &display, dc->display );
             if (NtUserEnumDisplaySettings( &display, ENUM_CURRENT_SETTINGS, &devmode, 0 ) &&
                 (devmode.dmFields & DM_BITSPERPEL) && devmode.dmBitsPerPel)
                 return devmode.dmBitsPerPel;
@@ -267,7 +267,7 @@ static INT CDECL nulldrv_GetDeviceCaps( PHYSDEV dev, INT cap )
 
         memset( &devmode, 0, sizeof(devmode) );
         devmode.dmSize = sizeof(devmode);
-        init_unicode_string( &display, dc->display );
+        RtlInitUnicodeString( &display, dc->display );
         if (NtUserEnumDisplaySettings( &display, ENUM_CURRENT_SETTINGS, &devmode, 0 ) &&
             devmode.dmDisplayFrequency)
             return devmode.dmDisplayFrequency;

dlls/win32u/win32u_private.h

@@ -626,13 +626,6 @@ static inline BOOL is_win9x(void)
     return NtCurrentTeb()->Peb->OSPlatformId == VER_PLATFORM_WIN32s;
 }
 
-static inline void init_unicode_string( UNICODE_STRING *str, const WCHAR *data )
-{
-    str->Length = lstrlenW(data) * sizeof(WCHAR);
-    str->MaximumLength = str->Length + sizeof(WCHAR);
-    str->Buffer = (WCHAR *)data;
-}
-
 static inline const char *debugstr_us( const UNICODE_STRING *us )
 {
     if (!us) return "<null>";

dlls/win32u/winstation.c

@@ -450,11 +450,11 @@ HWND get_desktop_window(void)
         params.Environment     = peb->ProcessParameters->Environment;
         params.EnvironmentSize = peb->ProcessParameters->EnvironmentSize;
         params.hStdError       = peb->ProcessParameters->hStdError;
-        init_unicode_string( &params.CurrentDirectory.DosPath, system_dir );
-        init_unicode_string( &params.ImagePathName, appnameW + 4 );
-        init_unicode_string( &params.CommandLine, cmdlineW );
-        init_unicode_string( &params.WindowTitle, appnameW + 4 );
-        init_unicode_string( &params.Desktop, desktop );
+        RtlInitUnicodeString( &params.CurrentDirectory.DosPath, system_dir );
+        RtlInitUnicodeString( &params.ImagePathName, appnameW + 4 );
+        RtlInitUnicodeString( &params.CommandLine, cmdlineW );
+        RtlInitUnicodeString( &params.WindowTitle, appnameW + 4 );
+        RtlInitUnicodeString( &params.Desktop, desktop );
 
         ps_attr.TotalLength = sizeof(ps_attr);
         ps_attr.Attributes[0].Attribute    = PS_ATTRIBUTE_IMAGE_NAME;