Fix a crash when a selection was near the right/bottom edge and an adjustment was used.
Fix a crash when a selection was near the right/bottom edge and an adjustment was used.

Mailaender/Pinta,jakeclawson/Pinta,PintaProject/Pinta,PintaProject/Pinta,Fenex/Pinta,jakeclawson/Pinta,xxgreg/Pinta,PintaProject/Pinta,Fenex/Pinta,Mailaender/Pinta