Description:
------------
Calling a function in a rebound closure causes a crash.

This seems to be caused by dmitry's optimizations because this fixes the issue:
#define CACHED_PTR(num) 0.

Test script:
---------------
class foo {
	static function getClosure() {
		return static function () {
			//causes a crash (fbc not properly defined) in call after rebinding
			echo get_called_class(), "\n";
		};
	}
}
 
class subFoo { }
 
$c = foo::getClosure();
$c(); //foo
$c = $c->bindTo(new subFoo());
$c(); //crash

Expected result:
----------------
No crash.

Actual result:
--------------
>	php5ts_debug.dll!zend_do_fcall_common_helper_SPEC(_zend_execute_data * execute_data=0x025d2298, void * * * tsrm_ls=0x02784bf8)  Line 302 + 0x3 bytes	C
 	php5ts_debug.dll!ZEND_DO_FCALL_SPEC_CONST_HANDLER(_zend_execute_data * execute_data=0x025d2298, void * * * tsrm_ls=0x02784bf8)  Line 1721	C
 	php5ts_debug.dll!execute(_zend_op_array * op_array=0x025f23c8, void * * * tsrm_ls=0x02784bf8)  Line 136 + 0x11 bytes	C
 	php5ts_debug.dll!zend_execute_scripts(int type=8, void * * * tsrm_ls=0x02784bf8, _zval_struct * * retval=0x00000000, int file_count=3, ...)  Line 1193 + 0x21 bytes	C
 	php5ts_debug.dll!php_execute_script(_zend_file_handle * primary_file=0x00aaf7b0, void * * * tsrm_ls=0x02784bf8)  Line 2330 + 0x1b bytes	C
 	php.exe!main(int argc=2, char * * argv=0x02784af8)  Line 1252 + 0x13 bytes	C