From 9322b3a4e1e7994ff9c8bd21098b868999fd7b0f Mon Sep 17 00:00:00 2001
From: Marek Roszko <mark.roszko@gmail.com>
Date: Sun, 29 Nov 2020 11:29:58 -0500
Subject: [PATCH] Use the C++ isnan function

---
 pcbnew/import_gfx/dxf_import_plugin.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/pcbnew/import_gfx/dxf_import_plugin.cpp b/pcbnew/import_gfx/dxf_import_plugin.cpp
index b0ee0b6c31..65bcf64a4d 100644
--- a/pcbnew/import_gfx/dxf_import_plugin.cpp
+++ b/pcbnew/import_gfx/dxf_import_plugin.cpp
@@ -35,7 +35,7 @@
 
 #include <trigo.h>
 #include <macros.h>
-#include <math.h>
+#include <cmath>    // isnan
 #include <board.h>
 #include "common.h"
 
@@ -564,9 +564,9 @@ void DXF_IMPORT_PLUGIN::addText( const DL_TextData& aData )
 {
     DXF_ARBITRARY_AXIS arbAxis = getArbitraryAxis( getExtrusion() );
     VECTOR3D refPointCoords    = ocsToWcs( arbAxis, VECTOR3D( aData.ipx, aData.ipy, aData.ipz ) );
-    VECTOR3D secPointCoords    = ocsToWcs( arbAxis, VECTOR3D( isnan( aData.apx ) ? 0 : aData.apx,
-                                                              isnan( aData.apy ) ? 0 : aData.apy,
-                                                              isnan( aData.apz ) ? 0 : aData.apz ) );
+    VECTOR3D secPointCoords    = ocsToWcs( arbAxis, VECTOR3D( std::isnan( aData.apx ) ? 0 : aData.apx,
+                                                              std::isnan( aData.apy ) ? 0 : aData.apy,
+                                                              std::isnan( aData.apz ) ? 0 : aData.apz ) );
 
     VECTOR2D refPoint( mapX( refPointCoords.x ), mapY( refPointCoords.y ) );
     VECTOR2D secPoint( mapX( secPointCoords.x ), mapY( secPointCoords.y ) );