Processed: add patch tag

[Debian Bug Tracking System]

Processing commands for control at bugs.debian.org:

> tags 804768 + patch
Bug #804768 [eigen3] eigen3: cause opencv ftbfs when LDBL_MANT_DIG greater than 112
Added tag(s) patch.
> thanks
Stopping processing here.

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804768: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=804768
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