Fix timeline frame buttons

Tahgibu-Animator/tahgibu-animator.desktop

@@ -1,10 +0,0 @@
-#!/usr/bin/env xdg-open
-[Desktop Entry]
-Name=Tahgibu Animator
-Comment=Animación 2D cuadro por cuadro, simple y sin marca de agua
-Exec=python3 %h/.local/share/tahgibu-animator/tahgibu_animator.py
-Icon=multimedia-animation
-Terminal=false
-Type=Application
-Categories=Graphics;2DGraphics;Video;
-StartupNotify=true

tahgibu_animator.py

@@ -471,7 +471,7 @@ class TahgibuAnimator:
 
     def timeline_click(self, e):
         cx = self.timeline.canvasx(e.x)
-        i = int((cx - 22) // SLOT_W)
+        i = int((cx) // (SLOT_W))
         if 0 <= i < len(self.frames):
             self.select_frame(i)