mesa: Fix Get(GL_TRANSPOSE_CURRENT_MATRIX_ARB) to transpose
This was just returning the same value as GL_CURRENT_MATRIX_ARB. Spotted while investigating something else in apitrace. Signed-off-by:Chris Forbes <chrisf@ijw.co.nz> Cc: "10.3 10.4" <mesa-stable@lists.freedesktop.org> Reviewed-by:
Kenneth Graunke <kenneth@whitecape.org> (cherry picked from commit 2b4fe85f)