Bug 1713 - You can't check the existence of a typedef using the preprocessor. Added a preprocessor check. Also removed an overqualified method name.
# Message with an array of NIL (not allowed)
VALID_HEADER method_call
HEADER_FIELD INTERFACE
TYPE STRING
STRING 'org.freedesktop.Foo'
HEADER_FIELD MEMBER
TYPE STRING
STRING 'Bar'
HEADER_FIELD PATH
TYPE OBJECT_PATH
OBJECT_PATH '/foo'
ALIGN 8
END_LENGTH Header
START_LENGTH Body
TYPE ARRAY
TYPE NIL
UINT32 5
## we want it to fail because of type nil, not because the length is no good
## so pad out the message with 5 bytes
BYTE 1
BYTE 2
BYTE 3
BYTE 4
BYTE 5
END_LENGTH Body