Fix Null-Error when custom controller provided

example/example_01/pubspec.lock

@@ -46,10 +46,10 @@ packages:
   drawing_animation:
     dependency: "direct main"
     description:
-      path: "../.."
-      relative: true
-    source: path
-    version: "0.0.7"
+      name: drawing_animation
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.8"
   flutter:
     dependency: "direct main"
     description: flutter

example/example_01/pubspec.yaml

@@ -15,7 +15,8 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  drawing_animation: ^0.0.8
+  drawing_animation:
+    path: ../../
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^0.1.2

example/example_02/lib/main.dart

@@ -62,6 +62,7 @@ class SvgDrawingWithCustomControllerState
   }
 
   void _startAnimation() {
+    print('uhu');
     if (_running) {
       _controller.stop();
     } else {

example/example_02/pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.2.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -46,10 +46,10 @@ packages:
   drawing_animation:
     dependency: "direct main"
     description:
-      name: drawing_animation
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.0.5"
+      path: "../.."
+      relative: true
+    source: path
+    version: "0.0.8"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -66,7 +66,7 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.3+1"
+    version: "0.12.5"
   meta:
     dependency: transitive
     description:
@@ -108,7 +108,7 @@ packages:
       name: quiver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.3"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -134,7 +134,7 @@ packages:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.8"
+    version: "2.0.0"
   string_scanner:
     dependency: transitive
     description:
@@ -155,7 +155,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.2"
+    version: "0.2.5"
   typed_data:
     dependency: transitive
     description:

example/example_02/pubspec.yaml

@@ -15,7 +15,8 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  drawing_animation: ^0.0.8
+  drawing_animation:
+    path: ../../
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.

example/example_03/pubspec.yaml

@@ -16,7 +16,8 @@ dependencies:
   flutter:
     sdk: flutter
   url_launcher: ^4.2.0+1
-  drawing_animation: ^0.0.8
+  drawing_animation:
+    path: ../../
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.

example/example_04/pubspec.yaml

@@ -15,7 +15,8 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  drawing_animation: ^0.0.8
+  drawing_animation:
+    path: ../../
   path_provider: ^0.5.0
   simple_permissions: ^0.1.9
   vector_math: any

lib/src/drawing_widget.dart

@@ -293,7 +293,7 @@ abstract class _AbstractAnimatedDrawingState extends State<AnimatedDrawing> {
 
   Animation<double> getAnimation() {
     Animation<double> animation;
-    if (!this.widget.run) {
+    if (this.widget.run == null || !this.widget.run) {
       animation = this.controller;
     } else if (this.curve != null &&
         this.animationCurve == widget.animationCurve) {