capstone.h: note that in Skipdata mode, invalid instruction has id = 0
diff --git a/include/capstone.h b/include/capstone.h
index a2fdf1a..81063f2 100644
--- a/include/capstone.h
+++ b/include/capstone.h
@@ -210,6 +210,7 @@
// Find the instruction id from header file of corresponding architecture,
// such as arm.h for ARM, x86.h for X86, etc...
// This information is available even when CS_OPT_DETAIL = CS_OPT_OFF
+ // NOTE: in Skipdata mode, "data" instruction has 0 for this id field.
unsigned int id;
// Address (EIP) of this instruction