fix windows build

Author: jef-n

src/analysis/raster/qgsrastermatrix.cpp

@@ -217,7 +217,7 @@ bool QgsRasterMatrix::oneArgumentOperation( OneArgOperator op )
           mData[i] = static_cast<float>( atan( value ) );
           break;
         case opSIGN:
-          mData[i] = -value;
+          mData[i] = static_cast<float>( -value );
       }
     }
   }

src/core/symbology-ng/qgsfillsymbollayerv2.cpp

@@ -437,7 +437,7 @@ void QgsLinePatternFillSymbolLayer::startRender( QgsSymbolV2RenderContext& conte
 
   //find a suitable multiple of width and heigh
 
-  QImage patternImage( fabs( width ), height, QImage::Format_ARGB32 );
+  QImage patternImage( qAbs( width ), height, QImage::Format_ARGB32 );
   patternImage.fill( 0 );
   QPainter p( &patternImage );
   p.setRenderHint( QPainter::Antialiasing, true );