fix "make test"

Author: jcupitt

config.h.in~

@@ -2233,7 +2233,7 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_vips_image_new_from_memory, 0, 0, 5)
 	ZEND_ARG_TYPE_INFO(0, width, IS_LONG, 0)
 	ZEND_ARG_TYPE_INFO(0, height, IS_LONG, 0)
 	ZEND_ARG_TYPE_INFO(0, bands, IS_LONG, 0)
-	ZEND_ARG_TYPE_INFO(0, format, IS_LONG, 0)
+	ZEND_ARG_TYPE_INFO(0, format, IS_STRING, 0)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_vips_image_write_to_memory, 0, 0, 1)
@@ -2258,7 +2258,7 @@ ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_vips_call, 0, 0, 2)
 	ZEND_ARG_TYPE_INFO(0, name, IS_STRING, 0)
-	ZEND_ARG_TYPE_INFO(0, resource, IS_RESOURCE, 0)
+	ZEND_ARG_TYPE_INFO(0, resource, IS_RESOURCE, 1)
 	ZEND_ARG_VARIADIC_INFO(0, vars)
 ZEND_END_ARG_INFO()
 
@@ -2284,7 +2284,7 @@ ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_vips_image_set_type, 0, 0, 4)
 	ZEND_ARG_TYPE_INFO(0, image, IS_RESOURCE, 0)
-	ZEND_ARG_TYPE_INFO(0, type, IS_LONG, 0)
+	ZEND_ARG_TYPE_MASK(0, type, MAY_BE_LONG|MAY_BE_STRING, NULL)
 	ZEND_ARG_TYPE_INFO(0, field, IS_STRING, 0)
 	ZEND_ARG_INFO(0, value)
 ZEND_END_ARG_INFO()