Fix qt4 build

nyalldawson · nyalldawson · commit c3468fc70f0f · 2017-01-11T14:06:29.000+10:00
diff --git a/src/core/qgsstatisticalsummary.h b/src/core/qgsstatisticalsummary.h
@@ -18,6 +18,7 @@
 
 #include <QMap>
 #include <QVariant>
+#include <qnumeric.h>
 
 /***************************************************************************
  * This class is considered CRITICAL and any change MUST be accompanied with
