fix: division by zero in normalizing

src/core/math/vector.cpp

@@ -59,7 +59,8 @@ Vecf Vecf::rotated(float t) const {
 }
 
 Vecf Vecf::normalized() const {
-    return *this / this->magnitude();
+    float const magnitude{this->magnitude()};
+    return magnitude > 0.f ? *this / this->magnitude() : ce::Vecf::ZERO;
 }
 
 Vecf Vecf::reciprocal() const {