[patch] network_oper_n_cb support broken/extended COPS

[Paulius Zaleckas]

My Option GTM378 modem answers AT+COPS? command with not standard 
answer: +COPS: 0,0,"OMNITEL LT",2
Notice the ",2" in the end. This patch adds support for this "extended" 
answer in network_oper_n_cb function.
Index: src/gsmd/usock.c
===================================================================
--- src/gsmd/usock.c	(revision 4067)
+++ src/gsmd/usock.c	(working copy)
@@ -878,7 +878,7 @@
 		/* In case we're not registered, return an empty string */
 		buf[0] = '\0';
 	}
-	else if ( er->num_tokens == 3 &&
+	else if ( er->num_tokens >= 3 &&
 			er->tokens[0].type == GSMD_ECMD_RTT_NUMERIC &&
 			er->tokens[1].type == GSMD_ECMD_RTT_NUMERIC &&
 			er->tokens[2].type == GSMD_ECMD_RTT_STRING ) {