GitSmartHttpTools: Open SideBandOutputStream in try-with-resource

Change-Id: Ie7c17f98579e7241f2b5c8204435c76686eeb568
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.http.server/src/org/eclipse/jgit/http/server/GitSmartHttpTools.java

@@ -299,10 +299,11 @@ public class GitSmartHttpTools {
 
 	private static void writeSideBand(OutputStream out, String textForGit)
 			throws IOException {
-		@SuppressWarnings("resource" /* java 7 */)
-		OutputStream msg = new SideBandOutputStream(CH_ERROR, SMALL_BUF, out);
-		msg.write(Constants.encode("error: " + textForGit));
-		msg.flush();
+		try (OutputStream msg = new SideBandOutputStream(CH_ERROR, SMALL_BUF,
+				out)) {
+			msg.write(Constants.encode("error: " + textForGit));
+			msg.flush();
+		}
 	}
 
 	private static void writePacket(PacketLineOut pckOut, String textForGit)