fixes #9927: pascal_voc_detection_metrics low scores for first catategory in label_map

[GoldschmittGabriel]

Only add 1 if there is at least one element greater than 0 per row for ground-truth
See also issue #9927
This change should reviewed in detail, maybe this could have side effects, I am not aware of.

Description

This bug could results in wrong results and should be fixed

Type of change

For a new feature or function, please create an issue first to discuss it
with us before submitting a pull request.

Note: Please delete options that are not relevant.

• [x ] Bug fix (non-breaking change which fixes an issue)

Tests

Evaluate results with metric pascal voc evaluator that has unusual low scores on the first class.
you can stop on the changed line and see if there are row entries in the ground truth variable with only zeros

See also #9927

Test Configuration:

Checklist

• I have signed the Contributor License Agreement.
• I have read guidelines for pull request.
• My code follows the coding guidelines.
• I have performed a self code review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.

[diaconumadalina]

Hello everyone, I'm Mada, and I'm eager to begin contributing to open-source projects. TensorFlow seems like an excellent place to start. Could someone please help me determine if a specific issue is still open, and if so, guide me on how to proceed with it? I appreciate any assistance provided.