Ensure OS X target up to date

Snap.xcodeproj/project.pbxproj

@@ -32,6 +32,7 @@
 		EECDB39C1AC0CBFF006BBC11 /* View+Snap.swift in Sources */ = {isa = PBXBuildFile; fileRef = EECDB3671AC0C95C006BBC11 /* View+Snap.swift */; };
 		EECDB39D1AC0CC03006BBC11 /* Snap.h in Headers */ = {isa = PBXBuildFile; fileRef = EECDB3661AC0C95C006BBC11 /* Snap.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		EEFCF32C1AD910B900A425FA /* Debugging.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF32B1AD910B900A425FA /* Debugging.swift */; };
+		EEFCF32D1AD9250C00A425FA /* Debugging.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFCF32B1AD910B900A425FA /* Debugging.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -366,6 +367,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				EECDB3951AC0CBFF006BBC11 /* Constraint.swift in Sources */,
+				EEFCF32D1AD9250C00A425FA /* Debugging.swift in Sources */,
 				EECDB3991AC0CBFF006BBC11 /* ConstraintRelation.swift in Sources */,
 				EECDB39C1AC0CBFF006BBC11 /* View+Snap.swift in Sources */,
 				EECDB39A1AC0CBFF006BBC11 /* EdgeInsets.swift in Sources */,

Source/Constraint.swift

@@ -672,7 +672,7 @@ private extension NSLayoutAttribute {
 
 private struct ConstraintInstallInfo {
     
-    weak var view: UIView? = nil
+    weak var view: View? = nil
     let layoutConstraints: NSHashTable
     
 }

Source/Debugging.swift

@@ -106,7 +106,7 @@ private var labelKey = ""
 
 private func descriptionForObject(object: AnyObject) -> String {
     let pointerDescription = NSString(format: "%p", [object])
-    if let object = object as? UIView {
+    if let object = object as? View {
         return "<\(object.dynamicType):\(object.snp_label ?? pointerDescription)>"
     } else if let object = object as? LayoutConstraint {
         return "<\(object.dynamicType):\(object.snp_label ?? pointerDescription)>"