Reduced number of warnings.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4673 818b1a75-f10b-46b9-bf7c-635c3b92a50f

openair3/RAL-LTE/INTERFACE-802.21/INCLUDE/MIH_C_Types.h

@@ -21,6 +21,7 @@ Type definition and structure for 802.21 interface
 #include <sys/types.h>
 #include <linux/types.h>
 #warning " Hack USER_MODE"
+#undef USER_MODE
 #define USER_MODE
 
 //-----------------------------------------------------------------------------