Bug 1713 - You can't check the existence of a typedef using the preprocessor. Added a preprocessor check. Also removed an overqualified method name.
# Standard org.freedesktop.DBus.Hello message
VALID_HEADER method_call
HEADER_FIELD PATH
TYPE OBJECT_PATH
OBJECT_PATH '/org/freedesktop/DBus'
HEADER_FIELD INTERFACE
TYPE STRING
STRING 'org.freedesktop.DBus'
HEADER_FIELD MEMBER
TYPE STRING
STRING 'Hello'
HEADER_FIELD DESTINATION
TYPE STRING
STRING 'org.freedesktop.DBus'
HEADER_FIELD SIGNATURE
TYPE STRING
STRING ''
ALIGN 8
END_LENGTH Header
START_LENGTH Body
END_LENGTH Body