Warn if vkAcquireNextImageKHR too many images

[krOoze]

Warn on attempt to acquire too many images via vkAcquireNextImageKHR when timeout is not UINT32_MAX (otherwise that is not Valid Usage).

This is a recommendation of the specification:

If the number of currently acquired images is greater than this, vkAcquireNextImageKHR should not be called;

[mark-lunarg]

Anybody think that statement is strong enough to warrant an error?

[krOoze]

Well, "should not" is well defined in the specification. The user can do it, if he really really wants for some reason. It is well behaved; the user will either get the extra image, or VK_TIMEOUT or VK_NOT_READY (on a conformant driver that is).

BTW it was an error in layers before PR #1373

[mark-lunarg]

Ah, there it is, then -- thanks for the definitive answer.

[mark-lunarg]

Added to the BP tracking issue!