better soliaris ifdefs

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13678 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/libnatpmp/getgateway.c

@@ -45,7 +45,7 @@
 #define USE_SYSCTL_NET_ROUTE
 #endif
 
-#if (defined(sun) && defined(__SVR4))
+#if ((defined(sun) || defined(__sun)) && defined(__SVR4))
 #undef USE_PROC_NET_ROUTE
 #define USE_SOCKET_ROUTE
 #undef USE_SYSCTL_NET_ROUTE