fix warnings

Author: jef-n

src/app/dwg/libdxfrw/intern/dwgutil.cpp

@@ -58,7 +58,9 @@ void dwgRSCodec::decode239I( unsigned char *in, unsigned char *out, duint32 blk
     }
     int r = rsc.decode( data );
     if ( r < 0 )
+    {
       QgsDebugMsg( "WARNING: dwgRSCodec::decode239I, can't correct all errors" );
+    }
     k = i * 239;
     for ( int j = 0; j < 239; j++ )
     {

src/core/qgsmaprendererjob.cpp

@@ -217,10 +217,9 @@ LayerRenderJobs QgsMapRendererJob::prepareJobs( QPainter* painter, QgsLabelingEn
   QListIterator<QgsMapLayer*> li( mSettings.layers() );
   li.toBack();
 
-  bool cacheValid = false;
   if ( mCache )
   {
-    cacheValid = mCache->init( mSettings.visibleExtent(), mSettings.scale() );
+    bool cacheValid = mCache->init( mSettings.visibleExtent(), mSettings.scale() );
     QgsDebugMsg( QString( "CACHE VALID: %1" ).arg( cacheValid ) );
   }