added a language key for the integer validation rule
diff --git a/system/language/english/validation_lang.php b/system/language/english/validation_lang.php
index 1ca67c0..1e9ec2c 100644
--- a/system/language/english/validation_lang.php
+++ b/system/language/english/validation_lang.php
@@ -12,6 +12,7 @@
$lang['alpha_numeric'] = "The %s field may only contain alpha-numeric characters.";
$lang['alpha_dash'] = "The %s field may only contain alpha-numeric characters, underscores, and dashes.";
$lang['numeric'] = "The %s field must contain a number.";
+$lang['integer'] = "The %s field must contain an integer.";
$lang['matches'] = "The %s field does not match the %s field.";
?>
\ No newline at end of file