checkpatch: report the correct lines for single statement blocks

Report the correct lines for single statement blocks.  Currently we are
reporting the right number of lines, but not skipping the negative lines.
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

scripts/checkpatch.pl

@@ -2214,10 +2214,10 @@ sub process {
 			}
 			if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
 				my $herectx = $here . "\n";;
-				my $end = $linenr + statement_rawlines($block) - 1;
+				my $cnt = statement_rawlines($block);
 
-				for (my $ln = $linenr - 1; $ln < $end; $ln++) {
-					$herectx .= $rawlines[$ln] . "\n";;
+				for (my $n = 0; $n < $cnt; $n++) {
+					$herectx .= raw_line($linenr, $n) . "\n";;
 				}
 
 				WARN("braces {} are not necessary for single statement blocks\n" . $herectx);