Fix a bug where two separate '-' characters in a comment were interpreted as a single '--' sequence.

src/libCStreamedXML/parser.c

@@ -372,6 +372,7 @@ int csxml_feedChar(struct csxml* ctx, char ch)
         else {
             APPEND_CH(buffer, '-');
             APPEND_CH(buffer, ch);
+            ctx->state = StateComment;
         }
         break;
 

src/libStreamedXML/Parser.cpp

@@ -354,6 +354,7 @@ doBuffer:
             else {
                 buffer += L'-';
                 buffer += ch;
+                state = StateComment;
             }
             break;