Merge pull request #1860 from akortunov/warningfix

Do not use fall-through to avoid GCC warnings

extern/oics/tinyxmlparser.cpp

@@ -104,25 +104,17 @@ void TiXmlBase::ConvertUTF32ToUTF8( unsigned long input, char* output, int* leng
 
 	output += *length;
 
-	// Scary scary fall throughs.
-	switch (*length)
+    int lengthLeft = *length;
+    while (lengthLeft > 1)
     {
-		case 4:
         --output;
         *output = (char)((input | BYTE_MARK) & BYTE_MASK);
         input >>= 6;
-		case 3:
-			--output;
-			*output = (char)((input | BYTE_MARK) & BYTE_MASK);
-			input >>= 6;
-		case 2:
-			--output;
-			*output = (char)((input | BYTE_MARK) & BYTE_MASK);
-			input >>= 6;
-		case 1:
+        --lengthLeft;
+    }
+
     --output;
     *output = (char)(input | FIRST_BYTE_MARK[*length]);
-	}
 }