added missing lang entry for valid_ip validation error
diff --git a/system/language/english/validation_lang.php b/system/language/english/validation_lang.php
index 580ce29..1ca67c0 100644
--- a/system/language/english/validation_lang.php
+++ b/system/language/english/validation_lang.php
@@ -1,16 +1,17 @@
-<?php
-
-$lang['required'] = "The %s field is required.";
-$lang['isset'] = "The %s field must have a value.";
-$lang['valid_email'] = "The %s field must contain a valid email address.";
-$lang['valid_url'] = "The %s field must contain a valid URL.";
-$lang['min_length'] = "The %s field must be at least %s characters in length.";
-$lang['max_length'] = "The %s field can not exceed %s characters in length.";
-$lang['exact_length'] = "The %s field must be exactly %s characters in length.";
-$lang['alpha'] = "The %s field may only contain alphabetical characters.";
-$lang['alpha_numeric'] = "The %s field may only contain alpha-numeric characters.";
-$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['matches'] = "The %s field does not match the %s field.";
-
+<?php
+
+$lang['required'] = "The %s field is required.";
+$lang['isset'] = "The %s field must have a value.";
+$lang['valid_email'] = "The %s field must contain a valid email address.";
+$lang['valid_url'] = "The %s field must contain a valid URL.";
+$lang['valid_ip'] = "The %s field must contain a valid IP.";
+$lang['min_length'] = "The %s field must be at least %s characters in length.";
+$lang['max_length'] = "The %s field can not exceed %s characters in length.";
+$lang['exact_length'] = "The %s field must be exactly %s characters in length.";
+$lang['alpha'] = "The %s field may only contain alphabetical characters.";
+$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['matches'] = "The %s field does not match the %s field.";
+
?>
\ No newline at end of file