(save_or_restore_current_matrices): Function removed.
(save_current_matrix, restore_current_matrix): New functions. (adjust_frame_glyphs_for_frame_redisplay): Use them to save and restore the frame's current matrix. Due to the glyph pointer setup done in adjust_glyph_matrix, there is no easy way to make saving the current matrix in the desired matrix generally correct, so don't try it.
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