ios: fix crash when changing screen orientation with tiled wallpaper (#4511)

* ios: fix crash, when displaying wallpaper

* simpler

---------

Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>

apps/ios/Shared/Views/Helpers/ChatWallpaper.swift

@@ -23,6 +23,8 @@ struct ChatViewBackground: ViewModifier {
                 var image = context.resolve(image)
                 let rect = CGRectMake(0, 0, size.width, size.height)
                 func repeatDraw(_ imageScale: CGFloat) {
+                    // Prevent range bounds crash and dividing by zero
+                    if size.height == 0 || size.width == 0 || image.size.height == 0 || image.size.width == 0 { return }
                     image.shading = .color(tint)
                     let scale = imageScale * 1.57 // for some reason a wallpaper on iOS looks smaller than on Android
                     for h in 0 ... Int(size.height / image.size.height / scale) {

apps/ios/SimpleX.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -1,4 +1,5 @@
 {
+  "originHash" : "e2611d1e91fd8071abc106776ba14ee2e395d2ad08a78e073381294abc10f115",
   "pins" : [
     {
       "identity" : "codescanner",
@@ -22,6 +23,7 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/kirualex/SwiftyGif",
       "state" : {
+        "branch" : "master",
         "revision" : "5e8619335d394901379c9add5c4c1c2f420b3800"
       }
     },
@@ -43,5 +45,5 @@
       }
     }
   ],
-  "version" : 2
+  "version" : 3
 }