Fix handling of FP-classify where the last arg fails to convert

The last argument of an FP-classify function was checked for vailidity
as an expression, but we never ensured that the usual unary
conversions/etc properly resulted in a valid value. Thus, when we got
the value, it was null, so we had a null dereference.

This patch instead fails out/marks the function call as invalid if the
argument is incorrect.  I DID consider just allowing it to continue, but
the result was an extraneous error about how the last argument wasn't a
float (in this case, it was an overload set).

Fixes: #107411

0 files changed, 0 insertions, 0 deletions