src/Graphics/ffglut.cpp:493: error: DEAD_STORE
  The value written to &z2 (type double) is never used.
Showing all 1 steps of the trace


src/Graphics/ffglut.cpp:493:3: Write of unused value
491.     
492.     R z1= plot.z0;
493.     R z2= plot.z0;
         ^
494.     
495.     double r=0,g=0,b=0;