#700, Rendering fix for half note tuplets

Conditional was added to ensure that TypeLength value did not override the duration improperly.
Duplicated from logic present for all smaller note values to accomodate half notes.

src/MusicalScore/Graphical/VexFlow/VexFlowConverter.ts

@@ -61,7 +61,7 @@ export class VexFlowConverter {
           return "w";
       } else if (dur < 1 && dur >= 0.5) {
         // change to the next higher straight note to get the correct note display type
-        if (isTuplet) {
+        if (isTuplet && dur > 0.5) {
           return "w";
         }
         return "h";