Added exception for multiplication of a String with float.
Added exception for multiplication of a String with float.

ASP1234/voc,freakboy3742/voc,gEt-rIgHt-jR/voc,Felix5721/voc,Felix5721/voc,pombredanne/voc,pombredanne/voc,rubacalypse/voc,cflee/voc,cflee/voc,glasnt/voc,gEt-rIgHt-jR/voc,ASP1234/voc,glasnt/voc,freakboy3742/voc,rubacalypse/voc