File digitalcoin-qcustomplot.patch of Package digitalcoin

--- src/qt/qcustomplot.h	2014-12-06 13:08:12.000000000 +0100
+++ qcustomplot.h	2016-11-26 18:47:04.845498285 +0100
@@ -164,7 +164,7 @@
 */
 inline bool isInvalidData(double value)
 {
-  return isnan(value) || isinf(value);
+  return std::isnan(value) || std::isinf(value);
 }
 
 /*! \internal