Fixes bug 59661. Occurances of uninitialized variables... r=gagan, sr=mscott.

modules/libjar/nsJARChannel.cpp

@@ -169,7 +169,7 @@ NS_IMETHODIMP
 nsJARChannel::Cancel(nsresult status)
 {
     NS_ASSERTION(NS_FAILED(status), "shouldn't cancel with a success code");
-    nsresult rv;
+    nsresult rv = NS_OK;
     nsAutoMonitor monitor(mMonitor);
 
     if (mJarExtractionTransport) {

netwerk/cache/memcache/nsMemCacheChannel.cpp

@@ -125,7 +125,7 @@ public:
 
     NS_IMETHOD
     OnStartRequest(nsIChannel *channel, nsISupports *aContext) {
-        nsresult rv;
+        nsresult rv = NS_OK;
 		
 		NS_ASSERTION(mDownstreamListener, "no downstream listener");
 
@@ -141,7 +141,7 @@ public:
     NS_IMETHOD
     OnStopRequest(nsIChannel *channel, nsISupports *aContext,
                   nsresult aStatus, const PRUnichar* aStatusArg) {
-        nsresult rv;
+        nsresult rv = NS_OK;
 
 		
 		NS_ASSERTION(mDownstreamListener, "no downstream listener");

netwerk/mime/src/nsMIMEService.cpp

@@ -86,7 +86,7 @@ nsMIMEService::Init() {
 // nsIMIMEService methods
 NS_IMETHODIMP
 nsMIMEService::GetFromExtension(const char *aFileExt, nsIMIMEInfo **_retval) {
-    nsresult rv;
+    nsresult rv = NS_OK;
   	if( !mXML || NS_FAILED (rv = mXML->GetFromExtension( aFileExt, _retval ) ) )
   	{
   		if ( mNative )

netwerk/protocol/http/src/nsHTTPResponseListener.cpp

@@ -834,7 +834,7 @@ nsresult nsHTTPServerListener::Abort()
 nsresult nsHTTPServerListener::FireSingleOnData(nsIStreamListener *aListener, 
         nsISupports *aContext) 
 {
-    nsresult rv;
+    nsresult rv = NS_OK;
 
     if (mHeadersDone) {
         rv = FinishedResponseHeaders() ;

netwerk/protocol/jar/src/nsJARChannel.cpp

@@ -169,7 +169,7 @@ NS_IMETHODIMP
 nsJARChannel::Cancel(nsresult status)
 {
     NS_ASSERTION(NS_FAILED(status), "shouldn't cancel with a success code");
-    nsresult rv;
+    nsresult rv = NS_OK;
     nsAutoMonitor monitor(mMonitor);
 
     if (mJarExtractionTransport) {

netwerk/streamconv/converters/nsUnknownDecoder.cpp

@@ -126,7 +126,7 @@ nsUnknownDecoder::OnDataAvailable(nsIChannel *aChannel,
                                   PRUint32 aSourceOffset, 
                                   PRUint32 aCount)
 {
-  nsresult rv;
+  nsresult rv = NS_OK;
 
   if (!mNextListener) return NS_ERROR_FAILURE;