[src] Fix compile error 3.
[src] Fix compile error 3.

ngx_http_php_zend_uthread.h:55:2: error: implicit declaration of function ‘ngx_http_php__call_user_function_ex’ [-Werror=implicit-function-declaration]
  ngx_http_php__call_user_function_ex(object, function_name, retval_ptr, param_c
  ^
../../../ngx_php7/src/ngx_http_php_zend_uthread.c:817:9: note: in expansion of macro ‘ngx_http_php_call_user_function’
         ngx_http_php_call_user_function(EG(function_table), NULL, &func_main, c
         ^

rryqszq4/ngx_php7,rryqszq4/php7-nginx-module,rryqszq4/ngx_php7,rryqszq4/ngx_php7,rryqszq4/ngx_php7,rryqszq4/ngx_php7