[BUG] Fix bug introduced yesterday, fix FFT conv optimization and small pydotprint fix.

no news
- fix a test in FAST_COMPILE
- fix the fft conv optimizer to have higher prio then the default gpu conv optimizer.
- fix bug introduced yesterday in an optimization.

news.txt
internal, added LocalSequenceDB and LocalSeqOptimizer (Frederic B.)

FAST_COMPILE mean no c code! So most of GPU stuff don't work as they don't have perform.

I try to tell people to use optimizer=fast_compile instead.