Fix all illegal usages of safeAs function

Call of `safeAs` without specifying explicit type argument is hardly
  readable and may leads to hardly detectable errors

compiler/psi/src/org/jetbrains/kotlin/psi/psiUtil/ktPsiUtil.kt

@@ -684,8 +684,8 @@ fun KtExpression.getBinaryWithTypeParent(): KtBinaryExpressionWithTypeRHS? {
 
 fun KtExpression.topParenthesizedParentOrMe(): KtExpression {
     var result: KtExpression = this
-    while (KtPsiUtil.deparenthesizeOnce(result.parent.safeAs()) == result) {
-        result = result.parent.safeAs() ?: break
+    while (KtPsiUtil.deparenthesizeOnce(result.parent as? KtExpression) == result) {
+        result = result.parent as? KtExpression ?: break
     }
     return result
 }
@@ -711,4 +711,4 @@ tailrec fun KtTypeElement.unwrapNullability(): KtTypeElement? {
         is KtDefinitelyNotNullType -> this.innerType?.unwrapNullability()
         else -> this
     }
-}
+}