Bug 970271: Fix GCC warnings about ignored return value, r=jduell.mcbugs

netwerk/protocol/rtsp/controller/RtspControllerParent.cpp

@@ -9,6 +9,7 @@
 #include "nsIAuthPromptProvider.h"
 #include "mozilla/ipc/InputStreamUtils.h"
 #include "mozilla/ipc/URIUtils.h"
+#include "mozilla/unused.h"
 #include "nsNetUtil.h"
 #include "prlog.h"
 
@@ -22,7 +23,7 @@ PRLogModuleInfo* gRtspLog;
 #define SEND_DISCONNECT_IF_ERROR(rv)                         \
   if (NS_FAILED(rv) && mIPCOpen && mTotalTracks > 0ul) {     \
     for (uint32_t i = 0; i < mTotalTracks; i++) {            \
-      SendOnDisconnected(i, rv);                             \
+      unused << SendOnDisconnected(i, rv);                   \
     }                                                        \
   }