Remove unnecessary tracking of first entry

The pointer to the current position is enough to figure out whether the
proto string is the first one in the buffer. Removing the separate
tracking variable cleans up a static analyzer warning on dead
assignment.

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/config.c

@@ -435,7 +435,7 @@ static int wpa_config_parse_proto(const struct parse_data *data,
 static char * wpa_config_write_proto(const struct parse_data *data,
 				     struct wpa_ssid *ssid)
 {
-	int first = 1, ret;
+	int ret;
 	char *buf, *pos, *end;
 
 	pos = buf = os_zalloc(20);
@@ -444,27 +444,27 @@ static char * wpa_config_write_proto(const struct parse_data *data,
 	end = buf + 20;
 
 	if (ssid->proto & WPA_PROTO_WPA) {
-		ret = os_snprintf(pos, end - pos, "%sWPA", first ? "" : " ");
+		ret = os_snprintf(pos, end - pos, "%sWPA",
+				  pos == buf ? "" : " ");
 		if (ret < 0 || ret >= end - pos)
 			return buf;
 		pos += ret;
-		first = 0;
 	}
 
 	if (ssid->proto & WPA_PROTO_RSN) {
-		ret = os_snprintf(pos, end - pos, "%sRSN", first ? "" : " ");
+		ret = os_snprintf(pos, end - pos, "%sRSN",
+				  pos == buf ? "" : " ");
 		if (ret < 0 || ret >= end - pos)
 			return buf;
 		pos += ret;
-		first = 0;
 	}
 
 	if (ssid->proto & WPA_PROTO_OSEN) {
-		ret = os_snprintf(pos, end - pos, "%sOSEN", first ? "" : " ");
+		ret = os_snprintf(pos, end - pos, "%sOSEN",
+				  pos == buf ? "" : " ");
 		if (ret < 0 || ret >= end - pos)
 			return buf;
 		pos += ret;
-		first = 0;
 	}
 
 	return buf;