(svn r15637) -Fix: when you try to protect something from doing something it shouldn't be doing, make sure that the actions happening after that, doesn't start doing what it shouldn't be doing. This of course would only happen in rare corner cases.

src/gfx.cpp

@@ -294,7 +294,7 @@ static void HandleBiDiAndArabicShapes(char *buffer, const char *lastof)
 
 	char *t = buffer;
 	size_t length = 0;
-	while (*t != '\0' && length < lengthof(input_output)) {
+	while (*t != '\0' && length < lengthof(input_output) - 1) {
 		WChar tmp;
 		t += Utf8Decode(&tmp, t);
 		input_output[length++] = tmp;