tests: Prevent malloc with size 0

Found by clang-tidy's "clang-analyzer-optin.portability.UnixAPI" check.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

diff --git a/tests/commandhelper.c b/tests/commandhelper.c
index bf6a5baa4093b0c88e4db34953b6a8bc7be203b0..b3c65ab3cc2ed8b36bde15d565de40cf42a07cec 100644 (file)
--- a/tests/commandhelper.c
+++ b/tests/commandhelper.c
@@ -156,6 +156,9 @@ static int printEnvironment(FILE *log)
     for (length = 0; environ[length]; length++) {
     }
 
+    if (length == 0)
+        return 0;
+
     if (!(newenv = malloc(sizeof(*newenv) * length)))
         return -1;