[Bug c/48956] -Wconversion should warn when a complex value is assigned to a real result

[matt at bitbashing dot io]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48956

--- Comment #17 from Matt Kline <matt at bitbashing dot io> ---
Thanks for the info and such a quick response! I'll see if I can do the
required legwork.