fix about box (followup 0b940ca, fixes #14832)

Author: jef-n

src/app/qgsabout.cpp

@@ -87,7 +87,7 @@ void QgsAbout::init()
     {
       line = stream.readLine(); // line of text excluding '\n'
       //ignore the line if it starts with a hash....
-      if ( line.at( 0 ) == '#' )
+      if ( !line.isEmpty() && line.at( 0 ) == '#' )
         continue;
       QStringList myTokens = line.split( '\t', QString::SkipEmptyParts );
       lines << myTokens[0];
@@ -119,7 +119,7 @@ void QgsAbout::init()
     {
       line = stream.readLine(); // line of text excluding '\n'
       //ignore the line if it starts with a hash....
-      if ( line.at( 0 ) == '#' )
+      if ( !line.isEmpty() && line.at( 0 ) == '#' )
         continue;
       lines += line;
     }

src/core/qgsmaplayer.cpp

@@ -1026,7 +1026,7 @@ QString QgsMapLayer::capitaliseLayerName( const QString& name )
 
   QString layerName( name );
 
-  if ( capitaliseLayerName )
+  if ( capitaliseLayerName && !layerName.isEmpty() )
     layerName = layerName.at( 0 ).toUpper() + layerName.mid( 1 );
 
   return layerName;