Fix error where first character of entity name in entity reference was

sent to the wrong buffer, and ended up in content rather than entity
name.

src/libCStreamedXML/parser.c

@@ -550,7 +550,7 @@ int csxml_feedChar(struct csxml* ctx, char ch)
             ctx->state = StateCharEntity;
             ctx->entityChar = 0;
         } else if(c == ClassNameStartChar) {
-            APPEND_CH(buffer, ch);
+            APPEND_CH(buffer2, ch);
             ctx->state = StateEntityName;
         } else ERROR("Invalid entity name.");
         break;