Fixed warnings about unchecked fgets() return value with gcc 4

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2517 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip-apps/src/samples/auddemo.c b/pjsip-apps/src/samples/auddemo.c
index 5bc2c28..d3301fe 100644
--- a/pjsip-apps/src/samples/auddemo.c
+++ b/pjsip-apps/src/samples/auddemo.c
@@ -245,7 +245,7 @@
     pjmedia_port *wav = NULL;
     pjmedia_aud_param param;
     pjmedia_aud_stream *strm = NULL;
-    char line[10];
+    char line[10], *dummy;
     pj_status_t status;
 
     if (filename == NULL)
@@ -287,7 +287,7 @@
     }
 
     PJ_LOG(3,(THIS_FILE, "Recording started, press ENTER to stop"));
-    fgets(line, sizeof(line), stdin);
+    dummy = fgets(line, sizeof(line), stdin);
 
 on_return:
     if (strm) {
@@ -313,7 +313,7 @@
     pjmedia_port *wav = NULL;
     pjmedia_aud_param param;
     pjmedia_aud_stream *strm = NULL;
-    char line[10];
+    char line[10], *dummy;
     pj_status_t status;
 
     if (filename == NULL)
@@ -354,7 +354,7 @@
     }
 
     PJ_LOG(3,(THIS_FILE, "Playback started, press ENTER to stop"));
-    fgets(line, sizeof(line), stdin);
+    dummy = fgets(line, sizeof(line), stdin);
 
 on_return:
     if (strm) {