sgsnemu: sgsnemu stopped after recieving "Request accepted" from ggsn

"sgsnemu" stopped with the message "Received create PDP context response. Cause value: 128",
but normaly at that poit it should continue working and create "user plane".
Reason: Funtion "create_pdp_conf" checking result of "in46a_from_eua" and mistakenly
returned EOF when more than 1 IP address provided by GGSN.
Now function "create_pdp_conf" stopped with error when 0 IP provided or error code comes from "in46a_from_eua".
Fixes: 2d6a69e69a4b4cb2b8cc63c4810dae44e5a4d8f6 ("Add support for IPv4v6 End User Addresses")

Change-Id: I7881b8e1f27c432007cb6e5ff665a2ce55f103b5
diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c
index bb55b1c..630733b 100644
--- a/sgsnemu/sgsnemu.c
+++ b/sgsnemu/sgsnemu.c
@@ -1400,7 +1400,7 @@
 		return EOF;	/* Not what we expected */
 	}
 
-	if (in46a_from_eua(&pdp->eua, &addr)) {
+	if (in46a_from_eua(&pdp->eua, &addr) < 1) {
 		printf
 		    ("Received create PDP context response. Cause value: %d\n",
 		     cause);