[GP6] Import of double dot causes infinite stems and leads to a crash

bec7074 / Windows 7

Reproduced from scratch with GP6

The start point :

1) Load the .gpx file : test double dot.gpx

First result : the file is declared as corrupted (33/32 instead of expected 4/4) → Continue by pressing « Ignore »

Second result : infinite (very long) stem for the 16th, while the stem of the double dotted quarter note has disappeared.

2) Click on this double dotted quarter note → in the toolbar, click on the icon of the dot (single dot)

Result : crash

Notes:

- "Original" file (see measure 16) : DeVisée - Prélude.gpx

- Very former issue. I can reproduce since beginning July 2014