Fixed a bug in the cpp_tokenizer that only shows up on newer versions of

gcc.  It wasn't tokenizing double quoted strings right.

dlib/cpp_tokenizer/cpp_tokenizer_kernel_1.h

@@ -511,7 +511,7 @@ namespace dlib
                                 (temp.size() > 1 && temp[temp.size()-2] == '\\') ))
                             {
                                 buffer_token(DOUBLE_QUOTED_TEXT,temp);                         
-                                buffer_token(OTHER,'"');
+                                buffer_token(OTHER,"\"");
                                 break;
                             }
                             else