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Eli Zaretskii authored
src/dispnew.c (swap_glyph_pointers): Swap the used[] arrays and the hash values of the two rows. (copy_row_except_pointers): Preserve the used[] arrays and the hash values of the two rows. src/xdisp.c (row_hash): New function, body extracted from compute_line_metrics. (compute_line_metrics): Call row_hash, instead of computing the hash code inline. src/dispnew.c (verify_row_hash): Call row_hash for computing the hash code of a row, instead of duplicating code from xdisp.c. src/dispextern.h (row_hash): Add prototype.
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