api: fix size_t printf exception in vstudio

api.cpp

@@ -232,10 +232,10 @@ static char *getpoolnfo(char *params)
 		cbin2hex(nonce, (const char*) stratum.job.xnonce2, stratum.xnonce2_size);
 	}
 
-	sprintf(p, "URL=%s;USER=%s;H=%u;JOB=%s;DIFF=%.6f;N2SZ=%zd;N2=0x%s;PING=%u;DISCO=%u;UPTIME=%u|",
+	snprintf(p, MYBUFSIZ, "URL=%s;USER=%s;H=%u;JOB=%s;DIFF=%.6f;N2SZ=%d;N2=0x%s;PING=%u;DISCO=%u;UPTIME=%u|",
 		stratum.url, rpc_user ? rpc_user : "",
 		stratum.job.height, jobid, stratum.job.diff,
-		stratum.xnonce2_size, nonce, stratum.answer_msec,
+		(int) stratum.xnonce2_size, nonce, stratum.answer_msec,
 		stratum.disconnects, (uint32_t) (time(NULL) - stratum.tm_connected));
 
 	return p;

ccminer.cpp

@@ -1528,7 +1528,7 @@ static bool stratum_handle_response(char *buf)
 	gettimeofday(&tv_answer, NULL);
 	timeval_subtract(&diff, &tv_answer, &stratum.tv_submit);
 	// store time required to the pool to answer to a submit
-	stratum.answer_msec = (1000.0 * diff.tv_sec) + (uint32_t) (0.001 * diff.tv_usec);
+	stratum.answer_msec = (1000 * diff.tv_sec) + (uint32_t) (0.001 * diff.tv_usec);
 
 	share_result(json_is_true(res_val),
 		err_val ? json_string_value(json_array_get(err_val, 1)) : NULL);