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 no header padding
## VALID_HEADER includes a LENGTH Header and LENGTH Body
VALID_HEADER method_call
REQUIRED_FIELDS
## this byte array is filled with zeros to the natural length
## of the header
HEADER_FIELD UNKNOWN
TYPE ARRAY
TYPE BYTE
ALIGN 4
LENGTH ThisByteArray
START_LENGTH ThisByteArray
BYTE 1
ALIGN 8 1
END_LENGTH ThisByteArray
END_LENGTH Header
START_LENGTH Body
END_LENGTH Body