Fix Lamp Animation error introduced by #54

The changeset referenced makes the assumption that
`grouped_fcurves[chan]` is a dict. We really can't assume anything about
types this deep inside the animation converter.

korman/exporter/animation.py

@@ -673,10 +673,11 @@ class AnimationConverter:
                         continue
                     for i in range(chan_values):
                         if i not in chan_keyframes.values:
-                            if i in grouped_fcurves[chan]:
+                            try:
                                 fcurve = grouped_fcurves[chan][i]
+                            except:
+                                chan_keyframes.values[i] = defaults[chan]
                             else:
-                                fcurve = defaults[chan][i]
                                 if isinstance(fcurve, bpy.types.FCurve):
                                     chan_keyframes.values[i] = fcurve.evaluate(chan_keyframes.frame_num_blender)
                                 else: