* i2psnark: Fix rare IOOBE (ticket #777)

apps/i2psnark/java/src/org/klomp/snark/PeerState.java

@@ -356,11 +356,14 @@ class PeerState implements DataLoader
                   + piece + "," + begin + "," + length + ") from "
                   + peer);
 
+    // Lookup the correct piece chunk request from the list.
+    Request req;
+    synchronized(this)
+      {
         int r = getFirstOutstandingRequest(piece);
 
         // Unrequested piece number?
-    if (r == -1)
-      {
+        if (r == -1) {
             if (_log.shouldLog(Log.INFO))
                 _log.info("Unrequested 'piece: " + piece + ", "
                       + begin + ", " + length + "' received from "
@@ -368,10 +371,6 @@ class PeerState implements DataLoader
             return null;
         }
 
-    // Lookup the correct piece chunk request from the list.
-    Request req;
-    synchronized(this)
-      {
         req = outstandingRequests.get(r);
         while (req.getPiece() == piece && req.off != begin
                && r < outstandingRequests.size() - 1)