Fix for KT-17588: Compiler error while optimizer tries to get rid of captured variable

#KT-17588 Fixed

compiler/testData/codegen/box/closures/capturedVarsOptimization/kt17588.kt

@@ -0,0 +1,30 @@
+//WITH_RUNTIME
+class Test {
+
+    data class Style(
+            val color: Int? = null,
+            val underlined: Boolean? = null,
+            val separator: String = ""
+    )
+
+    init {
+        var flag: Boolean? = null
+
+        val receiver: String = "123"
+        try {
+            receiver.let { a2 ->
+                flag = false
+            }
+        } finally {
+            receiver.hashCode()
+        }
+        val style = Style(null, flag, "123")
+    }
+}
+
+
+fun box(): String {
+    Test()
+
+    return "OK"
+}