styles: explictly save symbol XML in UTF-8 (fixes #9045)

src/core/symbology-ng/qgsstylev2.cpp

@@ -119,6 +119,7 @@ bool QgsStyleV2::saveSymbol( QString name, QgsSymbolV2* symbol, int groupid, QSt
 
   QByteArray xmlArray;
   QTextStream stream( &xmlArray );
+  stream.setCodec( "UTF-8" );
   symEl.save( stream, 4 );
   char *query = sqlite3_mprintf( "INSERT INTO symbol VALUES (NULL, '%q', '%q', %d);",
                                  name.toUtf8().constData(), xmlArray.constData(), groupid );
@@ -222,6 +223,7 @@ bool QgsStyleV2::saveColorRamp( QString name, QgsVectorColorRampV2* ramp, int gr
 
   QByteArray xmlArray;
   QTextStream stream( &xmlArray );
+  stream.setCodec( "UTF-8" );
   rampEl.save( stream, 4 );
   char *query = sqlite3_mprintf( "INSERT INTO colorramp VALUES (NULL, '%q', '%q', %d);",
                                  name.toUtf8().constData(), xmlArray.constData(), groupid );
@@ -390,6 +392,7 @@ bool QgsStyleV2::save( QString filename )
     return false;
   }
   QTextStream ts( &f );
+  ts.setCodec( "UTF-8" );
   doc.save( ts, 2 );
   f.close();
 #endif
@@ -1029,6 +1032,7 @@ int QgsStyleV2::addSmartgroup( QString name, QString op, QgsSmartConditionMap co
 
   QByteArray xmlArray;
   QTextStream stream( &xmlArray );
+  stream.setCodec( "UTF-8" );
   smartEl.save( stream, 4 );
   char *query = sqlite3_mprintf( "INSERT INTO smartgroup VALUES (NULL, '%q', '%q')",
                                  name.toUtf8().constData(), xmlArray.constData() );
@@ -1318,6 +1322,7 @@ bool QgsStyleV2::exportXML( QString filename )
   }
 
   QTextStream ts( &f );
+  ts.setCodec( "UTF-8" );
   doc.save( ts, 2 );
   f.close();
 
@@ -1427,6 +1432,7 @@ bool QgsStyleV2::updateSymbol( StyleEntity type, QString name )
   QDomElement symEl;
   QByteArray xmlArray;
   QTextStream stream( &xmlArray );
+  stream.setCodec( "UTF-8" );
 
   char *query;