Make sure not to delete the shader function if it is the same.

wonder · wonder · commit 47f0e617c087 · 2010-08-10T20:26:07.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@14046 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/core/raster/qgsrastershader.cpp b/src/core/raster/qgsrastershader.cpp
@@ -82,6 +82,9 @@ bool QgsRasterShader::shade( double theRedValue, double theGreenValue, double th
 void QgsRasterShader::setRasterShaderFunction( QgsRasterShaderFunction* theFunction )
 {
   QgsDebugMsg( "called." );
+  
+  if ( mRasterShaderFunction == theFunction )
+    return;
 
   if ( 0 != theFunction )
   {

Original file line number	Diff line number	Diff line change
`@@ -82,6 +82,9 @@ bool QgsRasterShader::shade( double theRedValue, double theGreenValue, double th`
`82`	`82`	`void QgsRasterShader::setRasterShaderFunction( QgsRasterShaderFunction* theFunction )`
`83`	`83`	`{`
`84`	`84`	`QgsDebugMsg( "called." );`
	`85`	`+`
	`86`	`+ if ( mRasterShaderFunction == theFunction )`
	`87`	`+ return;`
`85`	`88`
`86`	`89`	`if ( 0 != theFunction )`
`87`	`90`	`{`