adapted method to core changes.

src/MusicalScore/Graphical/VexFlow/VexFlowMusicSheetCalculator.ts

@@ -50,18 +50,12 @@ export class VexFlowMusicSheetCalculator extends MusicSheetCalculator {
      * The staff entries are aligned with minimum needed x distances.
      * The MinimumStaffEntriesWidth of every measure will be set - needed for system building.
      * @param measures
+     * @returns the minimum required x width of the source measure (=list of staff measures)
      */
     protected calculateMeasureXLayout(measures: StaffMeasure[]): number {
-        // set measure length and Borders
-        for (let idx: number = 0, len: number = measures.length; idx < len; ++idx) {
-            let measure: VexFlowMeasure  = <VexFlowMeasure>measures[idx];
-            // set Measure StaffEntriesLength (needed later to calculate the whole Measure Width)
-            //measure.MinimumStaffEntriesWidth = measureLength;
-
-
-        }
-
-
+        // layout the measures in x.
+        // return the minimum required x width of this vertically aligned measure set:
+        return 0;
     }
 
     /**