[0.4.11] [WIN32SS][FONT] Check NULL of Face->style_name (reactos#1113)

CORE-15433
cherry picked from commit 0.4.12-dev-20-g
43e2089

Author: katahiromz

win32ss/gdi/ntgdi/freetype.c

@@ -1095,7 +1095,8 @@ IntGdiLoadFontsFromMemory(PGDI_LOAD_FONT pLoadFont,
     Status = RtlAnsiStringToUnicodeString(&Entry->FaceName, &AnsiString, TRUE);
     if (NT_SUCCESS(Status))
     {
-        if (Face->style_name[0] && strcmp(Face->style_name, "Regular"))
+        if (Face->style_name && Face->style_name[0] &&
+            strcmp(Face->style_name, "Regular") != 0)
         {
             RtlInitAnsiString(&AnsiString, Face->style_name);
             Status = RtlAnsiStringToUnicodeString(&Entry->StyleName, &AnsiString, TRUE);