fix warning

Author: jef-n

src/3d/terrain/qgsdemterraintileloader_p.cpp

@@ -32,6 +32,8 @@ static void _heightMapMinMax( const QByteArray &heightMap, float &zMin, float &z
   const float *zBits = ( const float * ) heightMap.constData();
   int zCount = heightMap.count() / sizeof( float );
   bool first = true;
+
+  zMin = zMax = std::numeric_limits<float>::quiet_NaN();
   for ( int i = 0; i < zCount; ++i )
   {
     float z = zBits[i];
@@ -45,9 +47,6 @@ static void _heightMapMinMax( const QByteArray &heightMap, float &zMin, float &z
     zMin = qMin( zMin, z );
     zMax = qMax( zMax, z );
   }
-
-  if ( first )
-    zMin = zMax = std::numeric_limits<float>::quiet_NaN();
 }
 
 

src/core/layout/qgslayoutitem.cpp

@@ -951,7 +951,7 @@ void QgsLayoutItem::applyDataDefinedOrientation( double &width, double &height,
     QgsLayoutItemPage::Orientation orientation = QgsLayoutUtils::decodePaperOrientation( orientationString, ok );
     if ( ok )
     {
-      double heightD, widthD;
+      double heightD = 0.0, widthD = 0.0;
       switch ( orientation )
       {
         case QgsLayoutItemPage::Portrait:

src/gui/qgsextentgroupbox.cpp

@@ -140,7 +140,7 @@ void QgsExtentGroupBox::setOutputExtent( const QgsRectangle &r, const QgsCoordin
     }
   }
 
-  int decimals;
+  int decimals = 4;
   switch ( mOutputCrs.mapUnits() )
   {
     case QgsUnitTypes::DistanceDegrees: