dri3: rework format/modifier caching

Cut down the unnecessary malloc/memcpy/free by utilising the explicit
copy provided by the client.

But above all: do so, after ensuring we get valid data from the
implementation.

Fixes: cef12efc15c ("glamor: Implement GetSupportedModifiers")
Cc: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Cc: Daniel Stone <daniels@collabora.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

0 files changed, 0 insertions, 0 deletions