If to when: do not add label to outer loop if not necessary

So #KT-24767 Fixed

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

@@ -89,11 +89,14 @@ class IfToWhenIntention : SelfTargetingRangeIntention<KtIfExpression>(KtIfExpres
             }
         }
 
+        var labelRequired = false
+
         fun KtExpressionWithLabel.addLabelIfNecessary(): KtExpressionWithLabel {
             if (this.getLabelName() != null) return this
             if (this.getStrictParentOfType<KtLoopExpression>() != nearestLoopIfAny) return this
             if (labelName != null) {
                 val jumpWithLabel = KtPsiFactory(project).createExpression("$text@$labelName") as KtExpressionWithLabel
+                labelRequired = true
                 return replaced(jumpWithLabel)
             }
             return this
@@ -187,7 +190,7 @@ class IfToWhenIntention : SelfTargetingRangeIntention<KtIfExpression>(KtIfExpres
 
         result.accept(loopJumpVisitor)
         val labelName = loopJumpVisitor.labelName
-        if (loop != null && labelName != null && loop.parent !is KtLabeledExpression) {
+        if (loop != null && loopJumpVisitor.labelRequired && labelName != null && loop.parent !is KtLabeledExpression) {
             val labeledLoopExpression = KtPsiFactory(result).createLabeledExpression(labelName)
             labeledLoopExpression.baseExpression!!.replace(loop)
             val replacedLabeledLoopExpression = loop.replace(labeledLoopExpression)

idea/testData/intentions/branched/ifWhen/ifToWhen/withLoopNoJumps.kt

@@ -0,0 +1,5 @@
+fun test() {
+    for (i in -2..2) {
+        <caret>if (i > 0) i.hashCode()
+    }
+}

idea/testData/intentions/branched/ifWhen/ifToWhen/withLoopNoJumps.kt.after

@@ -0,0 +1,7 @@
+fun test() {
+    for (i in -2..2) {
+        when {
+            i > 0 -> i.hashCode()
+        }
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -2619,6 +2619,11 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
                     runTest("idea/testData/intentions/branched/ifWhen/ifToWhen/withLoopExistingLabel.kt");
                 }
 
+                @TestMetadata("withLoopNoJumps.kt")
+                public void testWithLoopNoJumps() throws Exception {
+                    runTest("idea/testData/intentions/branched/ifWhen/ifToWhen/withLoopNoJumps.kt");
+                }
+
                 @TestMetadata("withLoopOriginal.kt")
                 public void testWithLoopOriginal() throws Exception {
                     runTest("idea/testData/intentions/branched/ifWhen/ifToWhen/withLoopOriginal.kt");