Description:
------------
resourcebundle_locales and ResourceBundle::getLocales
returns all locales with null/false/empty string parameter

Test script:
---------------
$r = resourcebundle_locales(''); //or false, null
echo join("\n", $r);

Expected result:
----------------
Warning: resourcebundle_locales(): Cannot fetch locales list in C:\www\test\index.php on line 3

Warning: join(): Invalid arguments passed in C:\www\test\index.php on line 4


Actual result:
--------------
af
af_ZA
am
am_ET
ar
ar_AE
ar_BH
ar_DZ
ar_EG
ar_IQ
ar_JO
ar_KW
ar_LB
ar_LY
ar_MA
ar_OM
ar_QA
ar_SA
ar_SD
ar_SY
ar_TN
ar_YE
as
as_IN
az
az_Cyrl
az_Cyrl_AZ
az_Latn
az_Latn_AZ
...