Bug 1713 - You can't check the existence of a typedef using the preprocessor. Added a preprocessor check. Also removed an overqualified method name.
## has one non-nul byte in header padding
## VALID_HEADER includes a LENGTH Header and LENGTH Body
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'
HEADER_FIELD UNKNOWN
TYPE STRING
STRING 'a'
ALIGN 8
## kill a padding byte and replace it
CHOP 1
BYTE 'q'
END_LENGTH Header
START_LENGTH Body
END_LENGTH Body