fix textconv leak in emit_rewrite_diff

We correctly free() for the normal diff case, but leak for
rewrite diffs.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

diff.c

@@ -550,6 +550,10 @@ static void emit_rewrite_diff(const char *name_a,
 		emit_rewrite_lines(&ecbdata, '-', data_one, size_one);
 	if (lc_b)
 		emit_rewrite_lines(&ecbdata, '+', data_two, size_two);
+	if (textconv_one)
+		free(data_one);
+	if (textconv_two)
+		free(data_two);
 }
 
 struct diff_words_buffer {