This makes dblink pass its installcheck test on platforms where

snprintf(data, len, %s, NULL) crash.

The code was trying to find a connection by name when it already had an
unnamed connection and did not have a name to search with.

Kris Jurka

contrib/dblink/dblink.c

@@ -310,11 +310,11 @@ dblink_open(PG_FUNCTION_ARGS)
 			conname = GET_STR(PG_GETARG_TEXT_P(0));
 			curname = GET_STR(PG_GETARG_TEXT_P(1));
 			sql = GET_STR(PG_GETARG_TEXT_P(2));
-		}
 			rcon = getConnectionByName(conname);
 			if (rcon)
 				conn = rcon->con;
 		}
+	}
 	else if (PG_NARGS() == 4)
 	{
 		/* text,text,text,bool */