Update woff2 to 2bc6acf

third_party/woff2/src/transform.cc

Index: third_party/woff2/src/transform.cc
diff --git a/third_party/woff2/src/transform.cc b/third_party/woff2/src/transform.cc
index b7b0cf0337ef7dae5f7ae2d10e56cc28976fb765..2ad8b163c3c82773e2e33b267089ef36ce9975eb 100644
--- a/third_party/woff2/src/transform.cc
+++ b/third_party/woff2/src/transform.cc
@@ -39,7 +39,7 @@ void WriteBytes(std::vector<uint8_t>* out, const uint8_t* data, size_t len) {
 }
 
 void WriteBytes(std::vector<uint8_t>* out, const std::vector<uint8_t>& in) {
-  for (int i = 0; i < in.size(); ++i) {
+  for (size_t i = 0; i < in.size(); ++i) {
     out->push_back(in[i]);
   }
 }