MCludgeShape ShapeNumber.w,Width.w,Height.w,Memory.l ; Cludge shape from existing mem

Creates a new chunky Shape object from some existing graphics memory that may or
may not contain some chunky-format graphics. Ensure that you have allocated at
least 16 bytes more memory than you need as the Shape will modify the base
address in order to facilitate proper block-handling routines on higher cpu's.
Width should be a multiple of 4. The base-address is modified with the
expression: (base=base+16) and $FFFFFFF0. If the autocookie feature of Mildred is
active some new memory will also be allocated for a cookie (not cludged). The
memory you cludge a Shape onto should generally be in fastram.