i removed a stray line of imcc code which accidentally converted an op's full name back to it's short name (e.g. branch_p => branch). this should make errors for missing ops or bad arguments easier to understand, as the op full name, short name, and arg count is now reported in the error message.
i also corrected a related test. these changes can be found in r9914. thanks to allison for the impetus to dive into imcc. ~jerry
