Fix integer overflow in FastUInt32ToBufferLeft

third_party/protobuf/patches/0012-fix-overflow-FastUInt32ToBufferLeft.patch

Index: third_party/protobuf/patches/0012-fix-overflow-FastUInt32ToBufferLeft.patch
diff --git a/third_party/protobuf/patches/0012-fix-overflow-FastUInt32ToBufferLeft.patch b/third_party/protobuf/patches/0012-fix-overflow-FastUInt32ToBufferLeft.patch
new file mode 100644
index 0000000000000000000000000000000000000000..34d97eb311c379ffac4c90818616e1e42c874665
--- /dev/null
+++ b/third_party/protobuf/patches/0012-fix-overflow-FastUInt32ToBufferLeft.patch
@@ -0,0 +1,11 @@
+--- a/src/google/protobuf/stubs/strutil.cc
++++ b/src/google/protobuf/stubs/strutil.cc
+@@ -981,7 +981,7 @@ static const char two_ASCII_digits[100][2] = {
+ };
+ 
+ char* FastUInt32ToBufferLeft(uint32 u, char* buffer) {
+-  int digits;
++  uint32 digits;
+   const char *ASCII_digits = NULL;
+   // The idea of this implementation is to trim the number of divides to as few
+   // as possible by using multiplication and subtraction rather than mod (%),