Debugger: Fix missing NOP in empty 'when' header (KT-29189)

idea/testData/debugger/tinyApp/src/stepping/stepOver/stepOverWhenWithInline.kt

@@ -86,4 +86,4 @@ inline fun foo(f: () -> Int): Int {
 
 fun test(i: Int) = i
 
-// STEP_OVER: 30
+// STEP_OVER: 32

idea/testData/debugger/tinyApp/src/stepping/stepOver/stepOverWhenWithInline.out

@@ -2,13 +2,16 @@ LineBreakpoint created at stepOverWhenWithInline.kt:5
 Run Java
 Connected to the target VM
 stepOverWhenWithInline.kt:5
+stepOverWhenWithInline.kt:7
 stepOverWhenWithInline.kt:8
 stepOverWhenWithInline.kt:9
 stepOverWhenWithInline.kt:7
+stepOverWhenWithInline.kt:13
 stepOverWhenWithInline.kt:14
 stepOverWhenWithInline.kt:17
 stepOverWhenWithInline.kt:18
 stepOverWhenWithInline.kt:13
+stepOverWhenWithInline.kt:25
 stepOverWhenWithInline.kt:26
 stepOverWhenWithInline.kt:27
 stepOverWhenWithInline.kt:25
@@ -21,14 +24,16 @@ stepOverWhenWithInline.kt:38
 stepOverWhenWithInline.kt:51
 stepOverWhenWithInline.kt:52
 stepOverWhenWithInline.kt:51
+stepOverWhenWithInline.kt:57
 stepOverWhenWithInline.kt:58
 stepOverWhenWithInline.kt:57
+stepOverWhenWithInline.kt:63
 stepOverWhenWithInline.kt:64
 stepOverWhenWithInline.kt:65
 stepOverWhenWithInline.kt:63
+stepOverWhenWithInline.kt:75
 stepOverWhenWithInline.kt:76
 stepOverWhenWithInline.kt:75
-stepOverWhenWithInline.kt:80
 Disconnected from the target VM
 
 Process finished with exit code 0

idea/testData/debugger/tinyApp/src/stepping/stepOver/whenWithoutExpression.kt

@@ -0,0 +1,19 @@
+package whenWithoutExpression
+
+fun test(a: String): String {
+    val b = a.toLowerCase()
+    //Breakpoint!
+    return when {
+        b.startsWith("a") -> "A"
+        b.startsWith("b") -> "B"
+        b.startsWith("c") -> "C"
+        else -> "other"
+    }
+}
+
+fun main() {
+    test("abcd")
+}
+
+// STEP_OVER: 4
+// PRINT_FRAME

idea/testData/debugger/tinyApp/src/stepping/stepOver/whenWithoutExpression.out

@@ -0,0 +1,11 @@
+LineBreakpoint created at whenWithoutExpression.kt:6
+Run Java
+Connected to the target VM
+whenWithoutExpression.kt:6
+whenWithoutExpression.kt:7
+whenWithoutExpression.kt:6
+whenWithoutExpression.kt:15
+whenWithoutExpression.kt:16
+Disconnected from the target VM
+
+Process finished with exit code 0