refactor: use positive condition in RNCSafeAreaViewShadowNode.cpp (#580)

* refactor: use positive condition

* chore: run ci on changes to common

Author: vonovak

.github/workflows/ios.yml

@@ -13,6 +13,7 @@ on:
     paths:
       - '.github/workflows/ios.yml'
       - 'ios/**'
+      - 'common/**'
       - 'example/ios/**'
 jobs:
   ios-build:

common/cpp/react/renderer/components/safeareacontext/RNCSafeAreaViewShadowNode.cpp

@@ -16,10 +16,10 @@ inline Style::Length valueFromEdges(
     Style::Length edge,
     Style::Length axis,
     Style::Length defaultValue) {
-  if (!edge.isUndefined()) {
+  if (edge.isDefined()) {
     return edge;
   }
-  if (!axis.isUndefined()) {
+  if (axis.isDefined()) {
     return axis;
   }
   return defaultValue;