Export this so that shared session modules can use it under win32.

Author: wez

ext/session/php_session.h

@@ -32,7 +32,7 @@
 #define PS_CREATE_SID_ARGS void **mod_data, int *newlen TSRMLS_DC
 
 /* default create id function */
-char *php_session_create_id(PS_CREATE_SID_ARGS);
+PHPAPI char *php_session_create_id(PS_CREATE_SID_ARGS);
 
 typedef struct ps_module_struct {
 	const char *s_name;

ext/session/session.c

@@ -589,7 +589,7 @@ static char *bin_to_readable(char *in, size_t inlen, char *out, char nbits)
 	return out;
 }
 
-char *php_session_create_id(PS_CREATE_SID_ARGS)
+PHPAPI char *php_session_create_id(PS_CREATE_SID_ARGS)
 {
 	PHP_MD5_CTX md5_context;
 	PHP_SHA1_CTX sha1_context;