don't reset integrator when output is beyond bounds, this causes glitches with noisy thermistors
main: fix warning
fix enstops being defiened as nc, so an nc endstop axis will not home
fix checking for min or max endstop
Merge pull request #155 from wolfmanjm/fix/endstops-nc

fix endstops being defined as nc, so an nc endstop axis will not home