Clang-tidy: enable readability-container-size-empty warning

Reviewers: sergey

Differential Revision: https://developer.blender.org/D8197

source/blender/io/collada/BCAnimationSampler.cpp

@@ -78,7 +78,7 @@ void BCAnimationSampler::add_object(Object *ob)
 BCAnimationCurveMap *BCAnimationSampler::get_curves(Object *ob)
 {
   BCAnimation &animation = *objects[ob];
-  if (animation.curve_map.size() == 0) {
+  if (animation.curve_map.empty()) {
     initialize_curves(animation.curve_map, ob);
   }
   return &animation.curve_map;
@@ -279,7 +279,7 @@ void BCAnimationSampler::find_depending_animated(std::set<Object *> &animated_ob
         break;
       }
     }
-  } while (found_more && candidates.size() > 0);
+  } while (found_more && !candidates.empty());
 }
 
 void BCAnimationSampler::get_animated_from_export_set(std::set<Object *> &animated_objects,