Add static cast to unsigned char whenever a character classification function is called with a signed char argument, in order to avoid assertions in Windows Debug configuration.

llvm-svn: 175006

llvm/tools/llvm-objdump/llvm-objdump.cpp

@@ -481,7 +481,7 @@ static void PrintSectionContents(const ObjectFile *o) {
       // Print ascii.
       outs() << "  ";
       for (std::size_t i = 0; i < 16 && addr + i < end; ++i) {
-        if (std::isprint(Contents[addr + i] & 0xFF))
+        if (std::isprint(static_cast<unsigned char>(Contents[addr + i]) & 0xFF))
           outs() << Contents[addr + i];
         else
           outs() << ".";