fix(runtime): validate bindablePropertyInstance before using it (#12989) e2c7b48dc0

Co-authored-by: hernan <hernan@rive.app>

Author: bodymovin

.rive_head

@@ -1 +1 @@
-a23e2ba586f435afcc8b7047a4d71069d508ebeb
+e2c7b48dc0bf78809a3b1d40fa95b1f3bf7ec5c2

src/animation/blend_state_1d_instance.cpp

@@ -100,7 +100,8 @@ void BlendState1DInstance::advance(float seconds,
         auto bindablePropertyInstance =
             stateMachineInstance->bindablePropertyInstance(
                 blendState->bindableProperty());
-        if (bindablePropertyInstance->is<BindablePropertyNumber>())
+        if (bindablePropertyInstance &&
+            bindablePropertyInstance->is<BindablePropertyNumber>())
         {
             value = bindablePropertyInstance->as<BindablePropertyNumber>()
                         ->propertyValue();

src/animation/blend_state_direct_instance.cpp

@@ -42,7 +42,8 @@ void BlendStateDirectInstance::advance(
             auto bindableInstance =
                 stateMachineInstance->bindablePropertyInstance(
                     bindableProperty);
-            if (bindableInstance->is<BindablePropertyNumber>())
+            if (bindableInstance &&
+                bindableInstance->is<BindablePropertyNumber>())
             {
                 auto bindableNumber =
                     bindableInstance->as<BindablePropertyNumber>();