agxv: fix map_buffer crash
!227 (merged) changed the MapMemory implementations to be MapMemory2KHR
implementations instead, with the comment that the former will be delegated to
the latter. However, it seems that the one internal usage of agxv_MapMemory
was not updated to call the common code that properly delegates to
agxv_MapMemory2KHR. This fixes this last internal usage
Without this change, I was getting a crash in this function due to agxv_MapMemory
being null. The other option here would be to change the call to be a
agxv_MapMemory2KHR call.
Note that I'm new to contributing to mesa so apologies if I went about this
entirely in the wrong way
Edited by Russell Greene