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[XForms] fl_set_gamma halts program!

From: Peter Rowat
Subject: [XForms] fl_set_gamma halts program!
Date: Sat, 4 Nov 2017 08:33:28 -0700

I made what seemed like a simple change to my program but got this fatal message:

In fl_set_gamma() [flcolor.c:334]: Ignored. Please call fl_set_gamma before fl_initialize()
Process 2238 stopped

When I call fl_set_gamme before fl_initialize the same message appears, twice! 

I’ve spent a lot of time trying to fix this, no success so far. I suspect it is related to the fact that I call fl_initialize twice: once to gather some information and exit XForms, then again to run the main display. 
I’m changing my code to call fl_initialize only once.

Is it the case that fl_initialize should never be called twice?

Meanwhile, this is the code in flcolor.c that emits the message:

fl_set_gamma( double r, double g, double b ) {
    if ( fli_imap[ 4 ].grayval )
        /* Too lazy to shuffle colormap around */

        M_err( "fl_set_gamma",
               "Ignored. Please call fl_set_gamma before fl_initialize()" );
 and here is the stack when the process is stopped:

Target 0: (modTS) stopped.

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
  * frame #0: 0x00000001001ea0d6 libforms.2.dylib`fli_get_cursor_byname + 102
    frame #1: 0x0000000100235ae6 libforms.2.dylib`fli_create_window + 166
    frame #2: 0x00000001001f6697 libforms.2.dylib`fl_initialize + 5671
    frame #3: 0x00000001000023e6 modTS`control_main(argc=1, argv=0x00007fff5fbff7f0) at control.c:212
    frame #4: 0x00000001000016ae modTS`main(argc=1, argv=0x00007fff5fbff7f0) at runit1.c:255
    frame #5: 0x00007fffea659235 libdyld.dylib`start + 1


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