Description:
------------
NumberFormatter does not work correctly only in lt & ar locales while trying to parse negative integers.

af int(-1)
af_NA int(-1)
af_ZA int(-1)
ak int(-1)
ak_GH int(-1)
sq int(-1)
sq_AL int(-1)
sq_XK int(-1)
sq_MK int(-1)
am int(-1)
am_ET int(-1)
ar bool(false)
ar_DZ bool(false)
ar_BH bool(false)
ar_KM bool(false)
ar_DJ bool(false)
ar_EG bool(false)
ar_ER bool(false)
ar_IQ bool(false)
ar_IL bool(false)
ar_YE bool(false)
ar_JO bool(false)
ar_QA bool(false)
ar_KW bool(false)
ar_LB bool(false)
ar_LY bool(false)
ar_MA bool(false)
ar_MR bool(false)
ar_OM bool(false)
ar_PS bool(false)
ar_SA bool(false)
ar_SY bool(false)
ar_SD bool(false)
ar_SO bool(false)
ar_SS bool(false)
ar_TD bool(false)
ar_TN bool(false)
ar_AE bool(false)
ar_EH bool(false)
...
ln_CG int(-1)
ln_CF int(-1)
lt bool(false)
lt_LT bool(false)
lu int(-1)
lu_CD int(-1)
lb int(-1)
lb_LU int(-1)


Test script:
---------------
$position = 0;
$formatter = new \NumberFormatter('lt', \NumberFormatter::DECIMAL);
$result = $formatter->parse(-1, \NumberFormatter::TYPE_INT64, $position);
var_dump($result);

Expected result:
----------------
int(-1)

Actual result:
--------------
bool(false)