Tuning string fix for all gp versions

Author: mikekirin

src/importexport/guitarpro/internal/importgtp-gp4.cpp

@@ -735,8 +735,8 @@ bool GuitarPro4::read(IODevice* io)
         for (int k = 0; k < strings; ++k) {
             tuning2[strings - k - 1] = tuning[k];
         }
-        StringData stringData(frets, strings, &tuning2[0]);
-        createTuningString(strings, &tuning2[0]);
+        bool useFlats = createTuningString(strings, &tuning2[0]);
+        StringData stringData(frets, strings, &tuning2[0], useFlats);
         Part* part = score->staff(i)->part();
         Instrument* instr = part->instrument();
         instr->setStringData(stringData);

src/importexport/guitarpro/internal/importgtp.cpp

@@ -2353,14 +2353,14 @@ bool GuitarPro3::read(IODevice* io)
         for (int k = 0; k < strings; ++k) {
             tuning2[strings - k - 1] = tuning[k];
         }
-        StringData stringData(frets, strings, &tuning2[0]);
+        bool useFlats = createTuningString(strings, &tuning2[0]);
+        StringData stringData(frets, strings, &tuning2[0], useFlats);
         Part* part = score->staff(i)->part();
         Instrument* instr = part->instrument();
         instr->setStringData(stringData);
         instr->setSingleNoteDynamics(false);
         part->setPartName(name);
         part->setPlainLongName(name);
-        createTuningString(strings, &tuning2[0]);
         //
         // determine clef
         //