Positive filter doesn't seem to work correctly

[chapuilo]

Let's assume that we have a sarif file example.txt where we have two results. One with id java/random-used-once and one with id java/path-injection.

Now let's assume that we are running:
filter_sarif.py --input example.txt --output out.txt -- +**/*.java*:java/path-injection

I am expecting that after running this command, only the result with id java/path-injection is shown.
But the outcome of this command is out.txt which is the same as example.txt.

I think that result should be initialized to False if there is at least one positive filter:

filter-sarif/filter_sarif.py

Line 14 in 3bb4414

result = True

What do you think about it ?