-Don't use Z_Malloc/Z_Free when allocating the buffer for screen wipes. D_DoomWadReboot calls Z_Init, which means that if the wad is changed during a screen wipe (which happens when connecting to a server upon startup), the pointer to the screen wipe buffer becomes invalid.
-Use new/delete instead.

git-svn-id: http://odamex.net/svn/root/trunk@3958 b0bcef46-2027-0410-bd56-ab726e9a1d04