Free42x - HP-IL extensions to Free42

[jch]

Updated from original Free42 release 1.5.13 :

• When DIM, SIZE, or SIMQ resize the indexed matrix, and when CLV deletes the indexed matrix, IJ should be set to (1, 1); and when DIM, SIZE, or SIMQ try to resize the matrix currently being edited by EDITN, and when CLV tries to delete the matrix currently being edited by EDITN, they should return a "Restricted Operation" error. Neither happened, creating the potential for memory corruption if IJ ended up pointing outside the matrix' data array. Fixed.
• STO and STO* allowed the target to be the matrix under edit by EDITN. They should not allow this, but return "Restricted Operation" instead. Fixed.
  

Other updates :

• Bug in "INxxx" function when Trace mode active
• Updated "About Free42"