Fix build warning

Author: nyalldawson

python/core/layout/qgslayoutitemhtml.sip

@@ -198,7 +198,7 @@ class QgsLayoutItemHtml: QgsLayoutMultiFrame
 
     virtual QSizeF totalSize() const;
 
-     virtual void render( QgsRenderContext &context, const QRectF &renderExtent, const int frameIndex,
+     virtual void render( QgsRenderContext &context, const QRectF &renderExtent, int frameIndex,
                  const QStyleOptionGraphicsItem *itemStyle = 0 );
 
     virtual double findNearbyPageBreak( double yPos );

python/core/layout/qgslayoutmultiframe.sip

@@ -111,7 +111,7 @@ class QgsLayoutMultiFrame: QgsLayoutObject, QgsLayoutUndoObjectInterface
  :rtype: QSizeF
 %End
 
-    virtual void render( QgsRenderContext &context, const QRectF &renderExtent, const int frameIndex,
+    virtual void render( QgsRenderContext &context, const QRectF &renderExtent, int frameIndex,
                          const QStyleOptionGraphicsItem *itemStyle = 0 ) = 0;
 %Docstring
  Renders a portion of the multiframe's content into a render ``context``.

src/3d/poly2tri/common/utils.h

@@ -32,17 +32,9 @@
 #ifndef UTILS_H
 #define UTILS_H
 
-// Otherwise #defines like M_PI are undeclared under Visual Studio
-#define _USE_MATH_DEFINES
-
 #include <exception>
 #include <math.h>
 
-// C99 removes M_PI from math.h
-#ifndef M_PI
-#define M_PI 3.14159265358979323846264338327
-#endif
-
 namespace p2t {
 
 const double PI_3div4 = 3 * M_PI / 4;

src/core/layout/qgslayoutitemhtml.h

@@ -204,7 +204,7 @@ class CORE_EXPORT QgsLayoutItemHtml: public QgsLayoutMultiFrame
 
     QString displayName() const override;
     QSizeF totalSize() const override;
-    void render( QgsRenderContext &context, const QRectF &renderExtent, const int frameIndex,
+    void render( QgsRenderContext &context, const QRectF &renderExtent, int frameIndex,
                  const QStyleOptionGraphicsItem *itemStyle = nullptr ) override;
 
     //overridden to break frames without dividing lines of text

src/core/layout/qgslayoutmultiframe.h

@@ -141,7 +141,7 @@ class CORE_EXPORT QgsLayoutMultiFrame: public QgsLayoutObject, public QgsLayoutU
      * \param frameIndex frame number for content
      * \param itemStyle item style options for graphics item rendering
      */
-    virtual void render( QgsRenderContext &context, const QRectF &renderExtent, const int frameIndex,
+    virtual void render( QgsRenderContext &context, const QRectF &renderExtent, int frameIndex,
                          const QStyleOptionGraphicsItem *itemStyle = nullptr ) = 0;
 
     /**

tests/src/core/testqgslayoutmultiframe.cpp

@@ -74,7 +74,7 @@ class TestMultiFrame : public QgsLayoutMultiFrame
       return QStringLiteral( "TestMultiFrame" );
     }
 
-    void render( QgsRenderContext &, const QRectF &, const int,
+    void render( QgsRenderContext &, const QRectF &, int,
                  const QStyleOptionGraphicsItem * ) override
     {