383b5e4b59
All of the dtstyle session save routines used sprintf/snprintf whereby
the destination buffer was also a source buffer, like so:
snprintf(bufr, sizeof(style.tmpBigStr), "%s*Fonts.x: %d\n", bufr, x);
^^^^ ^^ ^^^^
That results in undefined behavior, which mainly meant missing or
currupted XRM resources being saved in the session file for dtstyle.