divverent authored Feb 22, 2020 and Rudolf Polzer committed Feb 22, 2020

Since GCC 5, with this flag set, NaN compares equal to zero in some cases but
not others. Causes e.g. "attempted division by zero" error spam from this QC
code:

float x = nan("");
if (x == 0) {
  return 0;
}
return 1.0 / x;

Yes, those NaNs should not be happening in the first place, but suddenly
passing some but not all equality checks to zero seems rather dangerous.

Reference: issue #2412 (not a fix for it; the QC code has a problem too but
this change helps track it down properly).

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@12522 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=f96918f0