Debugger: suppress UNSAFE_CALL diagnostic in debug mode

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/unsafeCall.kt

@@ -0,0 +1,15 @@
+package unsafeCall
+
+// this test is used also to check more than one file for package in JetPositionManager:prepareTypeMapper. see forTests/simple.kt
+fun main(args: Array<String>) {
+    val s1: String? = "a"
+    val s2: String? = null
+    //Breakpoint!
+    args.size
+}
+
+// EXPRESSION: s1.length()
+// RESULT: 1: I
+
+// EXPRESSION: s2.length()
+// RESULT: java.lang.NullPointerException: Ljava/lang/NullPointerException;