gtp: Use struct ul16_t/struct ul66_t to avoid compiler warnings in OsmoSGSN
This is fixing various compiler warnings:
In file included from sgsn_libgtp.c:49:0:
include/gtp.h:397:48: warning: ‘struct ul66_t’ declared inside parameter list [enabled by default]
include/gtp.h:397:48: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
include/gtp.h:398:49: warning: ‘struct ul66_t’ declared inside parameter list [enabled by default]
include/gtp.h:399:53: warning: ‘struct ul16_t’ declared inside parameter list [enabled by default]
include/gtp.h:400:53: warning: ‘struct ul16_t’ declared inside parameter list [enabled by default]
include/gtp.h:397:48: warning: ‘struct ul66_t’ declared inside parameter list [enabled by default]
include/gtp.h:397:48: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
include/gtp.h:398:49: warning: ‘struct ul66_t’ declared inside parameter list [enabled by default]
include/gtp.h:399:53: warning: ‘struct ul16_t’ declared inside parameter list [enabled by default]
include/gtp.h:400:53: warning: ‘struct ul16_t’ declared inside parameter list [enabled by default]
diff --git a/gtp/gtp.h b/gtp/gtp.h
index 7417f08..54af96e 100644
--- a/gtp/gtp.h
+++ b/gtp/gtp.h
@@ -133,6 +133,9 @@
#define GTPCAUSE_221 221 /* For Future Use 221-240 */
#define GTPCAUSE_241 241 /* Cause Values Reserved For Gprs Charging Protocol Use (See Gtp' In Gsm 12.15) 241-255 */
+struct ul66_t;
+struct ul16_t;
+
/* GTP 0 header.
* Explanation to some of the fields:
* SNDCP NPDU Number flag = 0 except for inter SGSN handover situations