Description:
------------
in php 5.3
char *formatted = _php_math_number_format(1234.56, 2, ".", "\x00");
printf("%s", formatted);
will write "1234.56"
But, in php 5.4 it will write "1"

It happens because _php_math_number_format() in php 5.4 use 
_php_math_number_format_ex(), but code wasn't refactored correctly.

Test script:
---------------
char *formatted = _php_math_number_format(1234.56, 2, ".", "\x00");
printf("returns %s, but correct result is 1234.56", formatted);