Fix GH#27741: Import 1.x irregular measure property

Author: Jojo-Schmitz

src/engraving/rw/read114/read114.cpp

@@ -2051,7 +2051,8 @@ static void readMeasure(Measure* m, int staffIdx, XmlReader& e, ReadContext& ctx
         } else if (tag == "measureNumberMode") {
             m->setMeasureNumberMode(MeasureNumberMode(e.readInt()));
         } else if (tag == "irregular") {
-            m->setIrregular(e.readBool());
+            m->setIrregular(true);
+            e.skipCurrentElement();
         } else if (tag == "breakMultiMeasureRest") {
             m->setBreakMultiMeasureRest(e.readBool());
         } else if (tag == "sysInitBarLineType") {