add some comments referring to cs_errno() on failure of some APIs
diff --git a/include/capstone.h b/include/capstone.h
index b710fdb..e62402f 100644
--- a/include/capstone.h
+++ b/include/capstone.h
@@ -148,6 +148,8 @@
@count: number of instrutions to be disassembled, or 0 to get all of them
@return: the number of succesfully disassembled instructions,
or 0 if this function failed to disassemble the given code
+
+ On failure, call cs_errno() for error code.
*/
size_t cs_disasm(csh handle,
unsigned char *code, size_t code_size,
@@ -172,6 +174,8 @@
@count: number of instrutions to be disassembled, or 0 to get all of them
@return: the number of succesfully disassembled instructions,
or 0 if this function failed to disassemble the given code
+
+ On failure, call cs_errno() for error code.
*/
size_t cs_disasm_dyn(csh handle,
unsigned char *code, size_t code_size,