Segmentation fault with some random seeds

[0x0015]

When running the program with some random seeds, it fails with a segmentation fault (specifically from mandelbrot.cpp line 125)

some seed values that fail are: 927, 2586, 3815, 5234, and 5317

Here is a log of the debug output for a failing seed (when compiled with -DDEBUG)
log.txt

[heitzmann]

Thanks for the report! Should be fixed now.