fixed issue with format string in PCKPacker::flush

tools/pck/pck_packer.cpp

@@ -136,7 +136,7 @@ Error PCKPacker::flush(bool p_verbose) {
 		count += 1;
 		if (p_verbose) {
 			if (count % 100 == 0) {
-				printf("%i/%i (%.2f\%)\r", count, files.size(), float(count) / files.size() * 100);
+				printf("%i/%i (%.2f)\r", count, files.size(), float(count) / files.size() * 100);
 				fflush(stdout);
 			};
 		};