fix crash when only loading 'my genomes' into the peptidome analysis. Closes #369
fix crash when only loading 'my genomes' into the peptidome analysis. Closes #369

bmesuere/uni-test,unipept/unipept,unipept/unipept,bmesuere/uni-test,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept