Use semicolon as a directory delimiter on Windows
Windows path names have ':' inside as a drive letter separator. The
widespread convention on that platform is to use ';' as a list separator
in file paths, so let's follow suite.
It looks like this multi-value searchdir is only used in `ly_ctx_new()`,
and that all other functions operate on one directory at a time.
diff --git a/src/context.c b/src/context.c
index 28a72f1..a29f5fb 100644
--- a/src/context.c
+++ b/src/context.c
@@ -258,7 +258,7 @@
search_dir_list = strdup(search_dir);
LY_CHECK_ERR_GOTO(!search_dir_list, LOGMEM(NULL); rc = LY_EMEM, cleanup);
- for (dir = search_dir_list; (sep = strchr(dir, ':')) != NULL && rc == LY_SUCCESS; dir = sep + 1) {
+ for (dir = search_dir_list; (sep = strchr(dir, PATH_SEPARATOR[0])) != NULL && rc == LY_SUCCESS; dir = sep + 1) {
*sep = 0;
rc = ly_ctx_set_searchdir(ctx, dir);
if (rc == LY_EEXIST) {