Dataman: Make versioning define more explicit

src/modules/dataman/dataman.h

@@ -112,7 +112,7 @@ struct dataman_compat_s {
 };
 
 /* increment this define whenever a binary incompatible change is performed */
-#define DM_COMPAT_VERSION	1
+#define DM_COMPAT_VERSION	1ULL
 
 #define DM_COMPAT_KEY ((DM_COMPAT_VERSION << 32) + (sizeof(struct mission_item_s) << 24) + (sizeof(struct mission_s) << 16) + (sizeof(struct fence_vertex_s) << 8) + sizeof(struct dataman_compat_s))