Fix jwdj#117 playback not working in some cases with selection

CHANGES

@@ -643,3 +643,4 @@ different panes. Tie/untie option added for notes. Broken rhythm
 - Enable Midi playback for Mac based on Apple DLS Synthetiser thanks to mplay library (aupfred)
 - Fix Musicscore gets blank when clicking on the musicpanel (aupfred)
 - Updated about page and abc reference (aupfred)
+- Fix playing issue on selection when no extra header lines to be created by EasyABC (aupfred)

easy_abc.py

@@ -1195,7 +1195,8 @@ def process_abc_for_midi(abc_code, header, cache_dir, settings, tempo_multiplier
     #### create the abc_header which will be placed in front of the processed abc file
     # extra_lines is a list of all the MIDI commands to be put in abcheader
 
-    extra_lines = []
+    #FAU: enforce at least one extra_lines to avoid to introduce a blank line
+    extra_lines = ['%']
 
     # build default list of midi_program
     # this is needed in case no instrument per voices where defined or in case option "separate defaults per voice" is not checked
@@ -4342,7 +4343,10 @@ def GetAbcToPlay(self):
 
                 # for some strange reason the MIDI sequence seems to be cut-off in the end if the last note is short
                 # adding a silent extra note seems to fix this
-                text = text + os.linesep + '%%MIDI control 7 0' + os.linesep + 'A2'
+                #text = text + os.linesep + '%%MIDI control 7 0' + os.linesep + 'A2'
+                #FAU: the introduction of the previous line leads to have no sound at all on
+                #     selection. using embedded instruction doesn' work either Thus remove it
+                text = text.rstrip()# + '[I:MIDI control 7 0]' + os.linesep + 'A2'
 
                 return (tune, text)
             return (tune, self.editor.GetTextRange(position, end_position))