Mark method/closure call frame as active.

It is impossible to dump the frame during its initialization, as it does not contain all necessary information. Such frame should be skipped. After initialization is done, the frame has to be marked as active just before
evaluating a function body.

include/ph7int.h

@@ -1261,9 +1261,10 @@ struct VmFrame {
 	sxi32 iFlags;     /* Frame configuration flags (See below) */
 	sxu32 iExceptionJump; /* Exception jump destination */
 };
-#define VM_FRAME_EXCEPTION  0x01 /* Special Exception frame */
-#define VM_FRAME_THROW      0x02 /* An exception was thrown */
-#define VM_FRAME_CATCH      0x04 /* Catch frame */
+#define VM_FRAME_ACTIVE     0x01 /* Active call frame */
+#define VM_FRAME_EXCEPTION  0x02 /* Special Exception frame */
+#define VM_FRAME_THROW      0x04 /* An exception was thrown */
+#define VM_FRAME_CATCH      0x08 /* Catch frame */
 /*
  * When a debug stacktrace is extracted from Virtual Machine, all information about
  * calls (file, line, class, method, arguments) are stored in this structure.