Rewrite of slang_inline_asm_function() to do full parameter/argument substitution.

We had been taking a short-cut w/ asm inlines by just using parameters in order
rather than doing full formal parameter -> actual argument substitution like
ordinary inlined function calls.  This worked in all cases but one: mix() in
which the parameters were used in a different order.
This fixes bug 10821.
1 file changed