3 GXS BugFixes:

- GxsCircles was created twice, removed second.
 - Modified Gxs DataLayer to always write AuthorId, modified retrieval to clear string if NULL.
      This originally caused AuthorId to filled with GroupId.
 - Fixed rsgxsnetservice to use mInternalCircle, rather than mCircleId.



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7291 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/util/retrodb.cc

@@ -735,6 +735,10 @@ void RetroCursor::getString(int columnIndex, std::string &str){
                 	str.clear();
 #endif
     }
+    else
+    {
+       str.clear();
+    }
 }
 
 const void* RetroCursor::getData(int columnIndex, uint32_t &datSize){