Fixed mysofa_open so that it fills in the filterlength parameter.
Fixed mysofa_open so that it fills in the filterlength parameter.

brettsimons/libmysofa,brettsimons/libmysofa,brettsimons/libmysofa,brettsimons/libmysofa,brettsimons/libmysofa,brettsimons/libmysofa