Fix for bug 192300: nsICODecoder never calls OnDataAvailable() like the other decoders do

Modified nsICODecoder::SetImageData() to call mObserver->OnDataAvailable() like the other decoders do so that the image frame knows it can invalidate the area it occupies.

r=pavlov@netscape.com  sr=tor@acm.org

modules/libpr0n/decoders/bmp/nsICODecoder.cpp

@@ -79,6 +79,12 @@ nsresult nsICODecoder::SetImageData()
        ++i, frameOffset += bpr, decodeBufferPos += decodedLineLen) {
     mFrame->SetImageData(decodeBufferPos, decodedLineLen, frameOffset);
   }
+
+  nsRect r(0, 0, 0, 0);
+  mFrame->GetWidth(&r.width);
+  mFrame->GetHeight(&r.height);
+  mObserver->OnDataAvailable(nsnull, nsnull, mFrame, &r);
+
   return NS_OK;
 }