Closes https://github.com/assimp/assimp/issues/630: fix mis-merge.

code/ColladaLoader.cpp

@@ -1169,6 +1169,25 @@ void ColladaLoader::CreateAnimation( aiScene* pScene, const ColladaParser& pPars
                       }
                       ++pos;
                   }
+				  
+				  // https://github.com/assimp/assimp/issues/458
+			  	  // Sub-sample axis-angle channels if the delta between two consecutive
+                  // key-frame angles is >= 180 degrees.
+				  if (transforms[e.mTransformIndex].mType == Collada::TF_ROTATE && e.mSubElement == 3 && pos > 0 && pos < e.mTimeAccessor->mCount) {
+					  float cur_key_angle = ReadFloat(*e.mValueAccessor, *e.mValueData, pos, 0);
+					  float last_key_angle = ReadFloat(*e.mValueAccessor, *e.mValueData, pos - 1, 0);
+					  float cur_key_time = ReadFloat(*e.mTimeAccessor, *e.mTimeData, pos, 0);
+					  float last_key_time = ReadFloat(*e.mTimeAccessor, *e.mTimeData, pos - 1, 0);
+					  float last_eval_angle = last_key_angle + (cur_key_angle - last_key_angle) * (time - last_key_time) / (cur_key_time - last_key_time); 
+					  float delta = std::fabs(cur_key_angle - last_eval_angle);
+				      if (delta >= 180.0f) {
+						int subSampleCount = static_cast<int>(std::floorf(delta / 90.0f));
+						if (cur_key_time != time) {
+							float nextSampleTime = time + (cur_key_time - time) / subSampleCount;
+							nextTime = std::min(nextTime, nextSampleTime);
+						  }
+					  }
+				  }
               }
 
               // no more keys on any channel after the current time -> we're done