esx_util.h: Add ESX_VI_CHECK_ARG_LIST macro

This macro avoids code duplication when checking for arrays of objects.
Signed-off-by: NMarcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/esx/esx_util.h

@@ -26,6 +26,14 @@
 # include "internal.h"
 # include "viruri.h"
 
+# define ESX_VI_CHECK_ARG_LIST(val) \
+    do { \
+        if (!val || *val) { \
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Invalid argument")); \
+            return -1; \
+        } \
+    } while (0)
+
 typedef struct _esxUtil_ParsedUri esxUtil_ParsedUri;
 
 struct _esxUtil_ParsedUri {