Merge pull request #2245 from daquexian:fix_wsign_conversion

PiperOrigin-RevId: 246550729
diff --git a/googletest/src/gtest-printers.cc b/googletest/src/gtest-printers.cc
index a7c5e00..3337be3 100644
--- a/googletest/src/gtest-printers.cc
+++ b/googletest/src/gtest-printers.cc
@@ -237,7 +237,7 @@
   if (format == kHexEscape || (1 <= c && c <= 9)) {
     // Do nothing.
   } else {
-    *os << ", 0x" << String::FormatHexInt(static_cast<UnsignedChar>(c));
+    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
   }
   *os << ")";
 }