MinGW fix for plGLight isnan usage.

Sources/Plasma/PubUtilLib/plGLight/plPerspDirSlave.cpp

@@ -50,10 +50,6 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #include <cfloat>
 #include <cmath>
 
-#ifdef HS_BUILD_FOR_WIN32
-#define isnan _isnan
-#endif
-
 void plPerspDirSlave::Init() 
 { 
     plShadowSlave::Init();
@@ -188,9 +184,9 @@ bool plPerspDirSlave::SetupViewTransform(plPipeline* pipe)
         // is probably data-side.  I take full responsibility for this
         // hack-around breaking the entire system, loosing data, causing
         // unauthorized credit card transactions, etc.
-        if (isnan(bnd.GetMins().fX) || isnan(bnd.GetMins().fY))
+        if (std::isnan(bnd.GetMins().fX) || std::isnan(bnd.GetMins().fY))
             return false;
-        if (isnan(bnd.GetMaxs().fX) || isnan(bnd.GetMaxs().fY))
+        if (std::isnan(bnd.GetMaxs().fX) || std::isnan(bnd.GetMaxs().fY))
             return false;
 
         // THIS IS EVEN MORE WRONG
@@ -249,9 +245,9 @@ bool plPerspDirSlave::SetupViewTransform(plPipeline* pipe)
         // is probably data-side.  I take full responsibility for this
         // hack-around breaking the entire system, loosing data, causing
         // unauthorized credit card transactions, etc.
-        if (isnan(bnd.GetMins().fX) || isnan(bnd.GetMins().fY))
+        if (std::isnan(bnd.GetMins().fX) || std::isnan(bnd.GetMins().fY))
             return false;
-        if (isnan(bnd.GetMaxs().fX) || isnan(bnd.GetMaxs().fY))
+        if (std::isnan(bnd.GetMaxs().fX) || std::isnan(bnd.GetMaxs().fY))
             return false;
 
         plConst(float) kMinMinZ(1.f);

Sources/Plasma/PubUtilLib/plGLight/plShadowSlave.cpp

@@ -48,10 +48,6 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #include <cfloat>
 #include <cmath>
 
-#ifdef HS_BUILD_FOR_WIN32
-#define isnan _isnan
-#endif
-
 static const float kMinMinZ = 1.f; // totally random arbitrary number (has to be > 0).
 
 bool plShadowSlave::ISetupOrthoViewTransform()
@@ -137,9 +133,9 @@ bool plShadowSlave::ISetupPerspViewTransform()
     // is probably data-side.  I take full responsibility for this
     // hack-around breaking the entire system, loosing data, causing
     // unauthorized credit card transactions, etc.
-    if (isnan(bnd.GetMins().fX) || isnan(bnd.GetMins().fY))
+    if (std::isnan(bnd.GetMins().fX) || std::isnan(bnd.GetMins().fY))
         return false;
-    if (isnan(bnd.GetMaxs().fX) || isnan(bnd.GetMaxs().fY))
+    if (std::isnan(bnd.GetMaxs().fX) || std::isnan(bnd.GetMaxs().fY))
         return false;
 
     float cotX, cotY;