Index: trunk/ppStack/src/ppStack.h
===================================================================
--- trunk/ppStack/src/ppStack.h	(revision 27004)
+++ trunk/ppStack/src/ppStack.h	(revision 27075)
@@ -13,4 +13,5 @@
 // Mask values for inputs
 typedef enum {
+    PPSTACK_MASK_NONE   = 0x00,         // Nothing wrong
     PPSTACK_MASK_CAL    = 0x01,         // Photometric calibration failed
     PPSTACK_MASK_PSF    = 0x02,         // PSF measurement failed