LLVM 13 complains about two variables that are set but never read:

------------------->
cc -O2 -pipe -O0 -g -Werror -Wall -Wstrict-prototypes -Wunused-variable  -MD -MP -I/home/naddy/got/got/../include -I/home/naddy/got/got/../lib -DGOT_LIBEXECDIR=/home/naddy/bin -DGOT_VERSION=0.64-current -c /home/naddy/got/got/../lib/blame.c
/home/naddy/got/got/../lib/blame.c:127:16: error: variable 'left_start' set but not used [-Werror,-Wunused-but-set-variable]
                unsigned int left_start, left_count;
                             ^
/home/naddy/got/got/../lib/blame.c:128:16: error: variable 'right_start' set but not used [-Werror,-Wunused-but-set-variable]
                unsigned int right_start, right_count;
                             ^
2 errors generated.
*** Error 1 in got (<sys.mk>:87 'blame.o')
<-------------------

I think we can simply delete those variables and the function calls
that assign values to them.  Or does diff_chunk_get_*_start() have
any side effects that we need?  The regression tests don't show any
problems.

diff refs/heads/main refs/heads/llvm13
blob - 783c434b33577727fafbf7589d751e7601a9dcf7
blob + d2db8c1e2cd6a46130821551a293b51fa2c841b9
--- lib/blame.c
+++ lib/blame.c
@@ -124,8 +124,7 @@ blame_changes(struct got_blame *blame, struct diff_res
 	for (i = 0; i < diff_result->chunks.len &&
 	    blame->nannotated < blame->nlines; i++) {
 		struct diff_chunk *c = diff_chunk_get(diff_result, i);
-		unsigned int left_start, left_count;
-		unsigned int right_start, right_count;
+		unsigned int left_count, right_count;
 		int j;
 
 		/*
@@ -134,9 +133,7 @@ blame_changes(struct got_blame *blame, struct diff_res
 		 * that chunk ranges never exceed the number of lines
 		 * in the left/right input files.
 		 */
-		left_start = diff_chunk_get_left_start(c, diff_result, 0);
 		left_count = diff_chunk_get_left_count(c);
-		right_start = diff_chunk_get_right_start(c, diff_result, 0);
 		right_count = diff_chunk_get_right_count(c);
 
 		if (left_count == right_count) {
-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de