rfac: Reorder init.

Author: odmir

Sources/SwiftPlot/Renderer.swift

@@ -199,10 +199,6 @@ public struct Polygon {
     public var p1: Point, p2: Point, p3: Point
     public var tail: [Point]
 
-    public init() {
-        self.init(.zero, .zero, .zero)
-    }
-    
     public init(_ p1: Point, _ p2: Point, _ p3: Point, tail: [Point] = []) {
         (self.p1, self.p2, self.p3) = (p1, p2, p3)
         self.tail = tail
@@ -211,6 +207,10 @@ public struct Polygon {
     public init(_ p1: Point, _ p2: Point, _ p3: Point, tail: ArraySlice<Point>) {
         self.init(p1, p2, p3, tail: Array(tail))
     }
+    
+    public init() {
+        self.init(.zero, .zero, .zero)
+    }
 }
 
 extension Polygon: Sequence {