Fixed various gcc warnings especially related to ticket #82 when particular codecs are disabled

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@911 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip-apps/src/samples/simpleua.c b/pjsip-apps/src/samples/simpleua.c
index d7b6508..8c81e7d 100644
--- a/pjsip-apps/src/samples/simpleua.c
+++ b/pjsip-apps/src/samples/simpleua.c
@@ -253,8 +253,10 @@
     /* 
      * Add PCMA/PCMU codec to the media endpoint. 
      */
+#if defined(PJMEDIA_HAS_G711_CODEC) && PJMEDIA_HAS_G711_CODEC!=0
     status = pjmedia_codec_g711_init(g_med_endpt);
     PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
+#endif
 
     
     /*