VS2015: "No snprintf function found, please report!"

[cmdrf]

VS2015 finally implements snprintf, however the OpenAL CMakeLists.txt Fails to find it, giving the message "No snprintf function found, please report!".

Replacing the line
CHECK_FUNCTION_EXISTS(snprintf HAVE_SNPRINTF)
with
CHECK_SYMBOL_EXISTS(snprintf stdio.h HAVE_SNPRINTF)
fixes the issue. However, I'm not sure which implications exist for other OSes, and if the search for _snprintf is maybe unnecessary.

[kcat]

That change should be fine (my man pages also say snprintf is in stdio.h). Searching for _snprintf is still necessary for older MSVC versions, though as long as snprintf is found the script shouldn't bother looking.

Thanks! Fixed in commit 5543000.