[Sandbox Configuration] Do more checks on test

When testing the path for whether it's in storage, run more tests to
make sure we only care about valid paths, and a path that actually has
a string.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Preferences/Preferences/SandboxPathBehaviorController.m

@@ -119,9 +119,14 @@ - (void)removeStaleEntries {
 - (BOOL)matchesPath:(NSURL *)url {
 	id sandboxBrokerClass = NSClassFromString(@"SandboxBroker");
 	for(NSDictionary *entry in [self arrangedObjects]) {
-		NSURL *testPath = [NSURL fileURLWithPath:[entry objectForKey:@"path"]];
-		if([sandboxBrokerClass isPath:url aSubdirectoryOf:testPath])
-			return YES;
+		if([[entry objectForKey:@"valid"] isEqualToString:NSLocalizedPrefString(@"ValidYes")]) {
+			NSString *path = [entry objectForKey:@"path"];
+			if(path && [path length]) {
+				NSURL *testPath = [NSURL fileURLWithPath:[entry objectForKey:@"path"]];
+				if([sandboxBrokerClass isPath:url aSubdirectoryOf:testPath])
+					return YES;
+			}
+		}
 	}
 	return NO;
 }