Fix possibly dereferencing a null pointer

src/fcmatch.c

@@ -814,12 +814,15 @@ FcFontSetMatchInternal (FcFontSet   **sets,
 		    len = (p - s);
 		}
 		x = malloc (sizeof (char) * (len + 1));
+		if (x)
+		{
 		    strcpy (x, s);
 		    if (FcObjectFromName (x) > 0)
 			FcObjectSetAdd (os, x);
 		    s = p + 1;
 		    free (x);
 		}
+	    }
 	    free (ss);
 	}
 	FcPatternPrint2 (p, best, os);