Fixed crash when both mouse buttons used simultaneously with pencil tool
Fixed crash when both mouse buttons used simultaneously with pencil tool

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