builtin/blame.c::prepare_lines: fix allocation size of sb->lineno

If we are calling xrealloc on every single line, the least we can do
is get the right allocation size.

Signed-off-by: David Kastrup <dak@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: dakhubgit

builtin/blame.c

@@ -1763,7 +1763,7 @@ static int prepare_lines(struct scoreboard *sb)
 	while (len--) {
 		if (bol) {
 			sb->lineno = xrealloc(sb->lineno,
-					      sizeof(int *) * (num + 1));
+					      sizeof(int) * (num + 1));
 			sb->lineno[num] = buf - sb->final_buf;
 			bol = 0;
 		}
@@ -1773,7 +1773,7 @@ static int prepare_lines(struct scoreboard *sb)
 		}
 	}
 	sb->lineno = xrealloc(sb->lineno,
-			      sizeof(int *) * (num + incomplete + 1));
+			      sizeof(int) * (num + incomplete + 1));
 	sb->lineno[num + incomplete] = buf - sb->final_buf;
 	sb->num_lines = num + incomplete;
 	return sb->num_lines;