Revert "Stop PathFilter after walking all matching paths"

This reverts commit 75eb6a147f.
Applications that want a PathFilter to abort the walk early should be
using PathFilterGroup. When a PathFilterGroup is created with exactly
one path its implementation is the same that 75eb6 tried to perform,
but has been long documented as having the behavior of breaking a
higher level OR filter graph node.

Change-Id: I6c85d75c474784471c32e866eef3402b9f193c08

org.eclipse.jgit/src/org/eclipse/jgit/treewalk/filter/PathFilter.java

@@ -44,7 +44,6 @@
 
 package org.eclipse.jgit.treewalk.filter;
 
-import org.eclipse.jgit.errors.StopWalkException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.treewalk.TreeWalk;
@@ -98,10 +97,7 @@ public class PathFilter extends TreeFilter {
 
 	@Override
 	public boolean include(final TreeWalk walker) {
-		int cmp = walker.isPathPrefix(pathRaw, pathRaw.length);
+		return walker.isPathPrefix(pathRaw, pathRaw.length) == 0;
-		if (cmp > 0)
-			throw StopWalkException.INSTANCE;
-		return cmp == 0;
 	}
 
 	@Override