Add SR_ERR_ARG #define.

Changing the number of SR_ERR_SAMPLERATE is not a problem ATM, as we
never had a public release of libsigrok, i.e. nobody relies on the API yet.

diff --git a/sigrok.h b/sigrok.h
index 7b3d4a4967d9c38c92e552099c4752a5ea64c8ed..1ad12e96dea80b0f0896b557f16c7c93bf9085a8 100644 (file)
--- a/sigrok.h
+++ b/sigrok.h
@@ -53,7 +53,8 @@ extern "C" {
 #define SR_OK                 0 /* No error */
 #define SR_ERR               -1 /* Generic/unspecified error */
 #define SR_ERR_MALLOC        -2 /* Malloc/calloc/realloc error */
-#define SR_ERR_SAMPLERATE    -3 /* Incorrect samplerate */
+#define SR_ERR_ARG           -3 /* Function argument error */
+#define SR_ERR_SAMPLERATE    -4 /* Incorrect samplerate */
 
 #define SR_MAX_NUM_PROBES      64 /* Limited by uint64_t. */
 #define SR_MAX_PROBENAME_LEN   32