games/torcs: Fix build on -current.

Signed-off-by: B. Watson <yalhcru@gmail.com>

games/torcs/gcc7.diff

@@ -0,0 +1,12 @@
+diff -Naur torcs-1.3.7/src/drivers/olethros/geometry.cpp torcs-1.3.7.patched/src/drivers/olethros/geometry.cpp
+--- torcs-1.3.7/src/drivers/olethros/geometry.cpp	2006-01-06 10:22:29.000000000 -0500
++++ torcs-1.3.7.patched/src/drivers/olethros/geometry.cpp	2017-07-04 17:00:06.727000000 -0400
+@@ -27,6 +27,8 @@
+ #ifdef WIN32
+ #include <float.h>
+ #define isnan _isnan
++#else
++#define isnan std::isnan
+ #endif
+ 
+ 

games/torcs/torcs.SlackBuild

@@ -6,6 +6,8 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20170704 bkw: fix build on -current
+
 PRGNAM=torcs
 VERSION=${VERSION:-1.3.7}
 BUILD=${BUILD:-1}
@@ -53,6 +55,8 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+patch -p1 < $CWD/gcc7.diff
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \