checkpatch: fix continuation detection when handling spacing on operators

We are miscategorising a continuation fragment following an operator
which may lead to us thinking that there is a space after it when there is
not.  Fix this up.

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

scripts/checkpatch.pl

@@ -1793,7 +1793,7 @@ sub process {
 					$c = 'C' if ($elements[$n + 2] =~ /^$;/);
 					$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
 					$c = 'O' if ($elements[$n + 2] eq '');
-					$c = 'E' if ($elements[$n + 2] =~ /\s*\\$/);
+					$c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
 				} else {
 					$c = 'E';
 				}