stop leaking zlib buffers when using compressed streams

patch by pedemont@us.ibm.com
r=dougt, sr=alecf
should fix a pretty major leak!

netwerk/streamconv/converters/nsHTTPCompressConv.cpp

@@ -76,6 +76,11 @@ nsHTTPCompressConv::~nsHTTPCompressConv()
 
     if (mOutBuffer)
         nsMemory::Free(mOutBuffer);
+
+    // For some reason we are not getting Z_STREAM_END.  But this was also seen
+    //    for mozilla bug 198133.  Need to handle this case.
+    if ((mStreamInitialized == PR_TRUE) && (mStreamEnded == PR_FALSE))
+        inflateEnd (&d_stream);
 }
 
 NS_IMETHODIMP