Fixed Interpolation#pow2InInverse and #pow2OutInverse returning NaN when the value is zero.
Fixed Interpolation#pow2InInverse and #pow2OutInverse returning NaN when the value is zero.

bladecoder/libgdx,Zomby2D/libgdx,Zomby2D/libgdx,cypherdare/libgdx,stinsonga/libgdx,stinsonga/libgdx,libgdx/libgdx,NathanSweet/libgdx,libgdx/libgdx,cypherdare/libgdx,Zomby2D/libgdx,NathanSweet/libgdx,cypherdare/libgdx,bladecoder/libgdx,bladecoder/libgdx,libgdx/libgdx,tommyettinger/libgdx,bladecoder/libgdx,tommyettinger/libgdx,tommyettinger/libgdx,NathanSweet/libgdx,libgdx/libgdx,stinsonga/libgdx,Zomby2D/libgdx,cypherdare/libgdx,NathanSweet/libgdx,cypherdare/libgdx,bladecoder/libgdx,NathanSweet/libgdx,tommyettinger/libgdx,Zomby2D/libgdx,stinsonga/libgdx,tommyettinger/libgdx,stinsonga/libgdx,libgdx/libgdx