initialize insertable to TRUE in ctor

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7514 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dbtable.cpp

@@ -127,6 +127,7 @@ wxDbTable::wxDbTable(wxDb *pwxDb, const char *tblName, const int nCols,
     from                = "";                       // From clause
     selectForUpdate     = FALSE;                    // SELECT ... FOR UPDATE; Indicates whether to include the FOR UPDATE phrase
     queryOnly           = qryOnly;
+    insertable          = TRUE;
 
     assert (tblName);