Fix Seabear import if line ends with NL

We need to start second search from the start of the buffer if \r\n
search returns nothing.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

file.c

@@ -1000,6 +1000,7 @@ int parse_seabear_csv_file(const char *filename, int timef, int depthf, int temp
 	}
 
 	if (!ptr_old) {
+		ptr = mem.buffer;
 		while ((ptr = strstr(ptr, "\n\n")) != NULL) {
 			ptr_old = ptr;
 			ptr += 1;