Fix the DAC scan plotting of VFAT with warning

The filtering logic was selecting many VFAT without the warning flag.

Indeed, VFAT for which the FED was matching any of the FED of
problematic VFAT, and the slot was matching any of the slot of
problematic VFAT, and (same for oh), and (same for VFAT), were selected.

Instead, we now match, the VFAT that correspond to any of the
problematic ones.
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