Patch for olethros on Fedora

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Found compiling for Fedora 25:

> $ uname -a Linux buzz 4.9.14-200.fc25.x86_64 #1 SMP Mon Mar 13
> 19:26:40 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

inan needs to be qualified as std:inan. Diff:

$ cvs diff src/drivers/olethros/geometry.cpp
Index: src/drivers/olethros/geometry.cpp
===================================================================
RCS file: /cvsroot/torcs/torcs/torcs/src/drivers/olethros/geometry.cpp,v
retrieving revision 1.9
diff -r1.9 geometry.cpp
373c373
<                       if (isnan(r)) {
- ---
> if (std::isnan(r)) {

ChangeLog entry:

	* src/drivers/olethros/geometry.cpp (EstimateSphere):
	Qualify inan as std::inan.

Also filed as support request 12.

HTH,


Jeremy

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