fix requri construction

when we switched from one process to two, I introduced a small
optimisation: empty string are not send, so we receive NULL.
Constructing requri we need to make sure that relpath is not null.

1 files changed, 2 insertions, 1 deletions

diff --git a/ex.c b/ex.c
index 7ae4e93..c1e1ad9 100644
--- a/ex.c
+++ b/ex.c
@@ -208,7 +208,8 @@ launch_cgi(const char *spath, const char *relpath, const char *query,
 			goto childerr;
 
 		if (asprintf(&requri, "%s%s%s", spath,
-		    (relpath != NULL && *relpath == '\0') ? "" : "/", relpath) == -1)
+		    (relpath != NULL && *relpath == '\0') ? "" : "/",
+		    (relpath != NULL ? relpath : "")) == -1)
 			goto childerr;
 
 		argv[0] = argv[1] = ex;