flip.cpp: add cstdint include to make gcc happy

mmp · mmp · commit 85918d59e4be · 2025-10-22T12:59:33.000-07:00
diff --git a/src/ext/flip/flip.cpp b/src/ext/flip/flip.cpp
@@ -49,6 +49,7 @@
 #include <iostream>
 #include <fstream>
 #include <cassert>
+#include <cstdint>
 
 namespace flip_detail {
 
