Cleanup: smart casts of safe call receiver applied (do NOT cherry-pick to 1.0.X)

idea/src/org/jetbrains/kotlin/idea/debugger/evaluate/FrameVisitor.kt

@@ -133,7 +133,7 @@ class FrameVisitor(context: EvaluationContextImpl) {
 
     private fun isFunctionType(type: Type?): Boolean {
         return type?.sort == Type.OBJECT &&
-               type!!.internalName.startsWith(InlineCodegenUtil.NUMBERED_FUNCTION_PREFIX)
+               type.internalName.startsWith(InlineCodegenUtil.NUMBERED_FUNCTION_PREFIX)
     }
 
     private fun findLocalVariable(name: String, asmType: Type?, checkType: Boolean): Value? {

idea/src/org/jetbrains/kotlin/idea/quickfix/AddLoopLabelFix.kt

@@ -79,7 +79,7 @@ class AddLoopLabelFix(loop: KtLoopExpression, val jumpExpression: KtElement): Ko
             assert(element is KtBreakExpression || element is KtContinueExpression)
             assert((element as? KtLabeledExpression)?.getLabelName() == null)
             val loop = element?.getStrictParentOfType<KtLoopExpression>() ?: return null
-            return AddLoopLabelFix(loop, element!!)
+            return AddLoopLabelFix(loop, element)
         }
     }
 }

idea/src/org/jetbrains/kotlin/idea/refactoring/changeSignature/usages/KotlinParameterUsage.kt

@@ -51,7 +51,7 @@ class KotlinParameterUsage(
 ) : KotlinExplicitReferenceUsage<KtElement>(element) {
     override fun processReplacedElement(element: KtElement) {
         val qualifiedExpression = element.parent as? KtQualifiedExpression
-        val elementToShorten = if (qualifiedExpression?.receiverExpression == element) qualifiedExpression!! else element
+        val elementToShorten = if (qualifiedExpression?.receiverExpression == element) qualifiedExpression else element
         elementToShorten.addToShorteningWaitSet(Options(removeThis = true, removeThisLabels = true))
     }
 

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/extractionEngine/extractableAnalysisUtil.kt

@@ -720,7 +720,7 @@ private fun ExtractionData.suggestFunctionNames(returnType: KotlinType): List<St
     expressions.singleOrNull()?.let { expr ->
         val property = expr.getStrictParentOfType<KtProperty>()
         if (property?.initializer == expr) {
-            property?.name?.let { functionNames.add(KotlinNameSuggester.suggestNameByName("get" + it.capitalize(), validator)) }
+            property.name?.let { functionNames.add(KotlinNameSuggester.suggestNameByName("get" + it.capitalize(), validator)) }
         }
     }