[PATCH 3/4] scripts/checkincludes.pl: Fix a bug introduced in the last commit

[Cruz Julian Bishop <cruzjbishop@gmail.com>]

Since the previous commit, simply specifying -r without any files
caused no message to be displayed.

Before said commit, the usage() function was called.

This commit simply calls the usage() function if no files were
specified - This includes once other arguments are supported.

Signed-off-by: Cruz Julian Bishop <cruzjbishop@gmail.com>
---
 scripts/checkincludes.pl |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scripts/checkincludes.pl b/scripts/checkincludes.pl
index 7d713c2..cde7ce1 100755
--- a/scripts/checkincludes.pl
+++ b/scripts/checkincludes.pl
@@ -30,12 +30,16 @@ if ($#ARGV < 0) {
 	usage();
 }
 
+my $argc = 0;
+
 foreach my $arg (@ARGV) {
 	if ($arg eq "-r") {
 		$remove = 1;
 	} else {
 		open(my $f, '<', $arg)
 		    or die "Cannot open $arg: $!.\n";
+		    
+		$argc++;
 
 		my %includedfiles = ();
 		my @file_lines = ();
@@ -84,3 +88,7 @@ foreach my $arg (@ARGV) {
 		close($f);
 	}
 }
+
+if ($argc == 0) {
+	usage();
+}
-- 
1.7.9.5