plug-ins: avoid blinds crash by only allowing MAX_FANS segments
In GIMP 2.10 the number of segments was restricted to MAX_FANS. That max was later increased to 1024 which can crash the plug-in.
Also change the max displacement angle back to the GIMP 2.10 value of 90 degrees. (the value of x
repeats at 180 - x
, 180 + x
and 360-x
degress, so the interval is 0, 90 is enough to get all return values)
Fixes #11108 (closed)