Fix KNE in intentions

EA-124846 Fixed

idea/src/org/jetbrains/kotlin/idea/intentions/Utils.kt

@@ -79,10 +79,10 @@ fun getLambdaByImplicitItReference(expression: KtNameReferenceExpression) =
     resolveToAutoCreatedItDescriptor(expression)?.containingDeclaration?.source?.getPsi() as? KtFunctionLiteral
 
 // returns assignment which replaces initializer
-fun splitPropertyDeclaration(property: KtProperty): KtBinaryExpression {
+fun splitPropertyDeclaration(property: KtProperty): KtBinaryExpression? {
     val parent = property.parent
 
-    val initializer = property.initializer!!
+    val initializer = property.initializer ?: return null
 
     val explicitTypeToSet = if (property.typeReference != null) null else initializer.analyze().getType(initializer)
 

idea/src/org/jetbrains/kotlin/idea/intentions/branchedTransformations/intentions/UnfoldPropertyToIfIntention.kt

@@ -36,6 +36,7 @@ class UnfoldPropertyToIfIntention : SelfTargetingRangeIntention<KtProperty>(KtPr
 
     override fun applyTo(element: KtProperty, editor: Editor?) {
         val assignment = splitPropertyDeclaration(element)
+            ?: return // if element initializer is null the apply should not be invoked. If suddenly invoked splitPropertyDeclaration will return null
         BranchedUnfoldingUtils.unfoldAssignmentToIf(assignment, editor)
     }
 }

idea/src/org/jetbrains/kotlin/idea/intentions/branchedTransformations/intentions/UnfoldPropertyToWhenIntention.kt

@@ -38,7 +38,7 @@ class UnfoldPropertyToWhenIntention : SelfTargetingRangeIntention<KtProperty>(Kt
     }
 
     override fun applyTo(element: KtProperty, editor: Editor?) {
-        val assignment = splitPropertyDeclaration(element)
+        val assignment = splitPropertyDeclaration(element) ?: return
         BranchedUnfoldingUtils.unfoldAssignmentToWhen(assignment, editor)
     }
 }