Core/Movement: Corrected all speed checks after 23b6991273bac4ee9d7cf1b4ac3b9a92e0a7300e

Ref issue #19210

src/server/game/Movement/Spline/MoveSpline.cpp

@@ -206,7 +206,7 @@ bool MoveSplineInitArgs::Validate(Unit* unit) const
         return false;\
     }
     CHECK(path.size() > 1);
-    CHECK(velocity > 0.01f);
+    CHECK(velocity >= 0.01f);
     CHECK(time_perc >= 0.f && time_perc <= 1.f);
     //CHECK(_checkPathBounds());
     return true;