Fix freeing of records, when the given pointer is NULL.

Signed-off-by: Ewan Mellor <ewan@xensource.com>

tools/libxen/src/xen_host.c

@@ -76,6 +76,10 @@ const abstract_type xen_host_record_abstract_type_ =
 void
 xen_host_record_free(xen_host_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name_label);

tools/libxen/src/xen_host_cpu.c

@@ -78,6 +78,10 @@ const abstract_type xen_host_cpu_record_abstract_type_ =
 void
 xen_host_cpu_record_free(xen_host_cpu_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     xen_host_record_opt_free(record->host);

tools/libxen/src/xen_network.c

@@ -74,6 +74,10 @@ const abstract_type xen_network_record_abstract_type_ =
 void
 xen_network_record_free(xen_network_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name_label);

tools/libxen/src/xen_pif.c

@@ -80,6 +80,10 @@ const abstract_type xen_pif_record_abstract_type_ =
 void
 xen_pif_record_free(xen_pif_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name);

tools/libxen/src/xen_sr.c

@@ -79,6 +79,10 @@ const abstract_type xen_sr_record_abstract_type_ =
 void
 xen_sr_record_free(xen_sr_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name_label);

tools/libxen/src/xen_user.c

@@ -60,6 +60,10 @@ const abstract_type xen_user_record_abstract_type_ =
 void
 xen_user_record_free(xen_user_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->short_name);

tools/libxen/src/xen_vbd.c

@@ -79,6 +79,10 @@ const abstract_type xen_vbd_record_abstract_type_ =
 void
 xen_vbd_record_free(xen_vbd_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     xen_vm_record_opt_free(record->vm);

tools/libxen/src/xen_vdi.c

@@ -93,6 +93,10 @@ const abstract_type xen_vdi_record_abstract_type_ =
 void
 xen_vdi_record_free(xen_vdi_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name_label);

tools/libxen/src/xen_vif.c

@@ -84,6 +84,10 @@ const abstract_type xen_vif_record_abstract_type_ =
 void
 xen_vif_record_free(xen_vif_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name);

tools/libxen/src/xen_vm.c

@@ -189,6 +189,10 @@ const abstract_type xen_vm_record_abstract_type_ =
 void
 xen_vm_record_free(xen_vm_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     free(record->name_label);

tools/libxen/src/xen_vtpm.c

@@ -69,6 +69,10 @@ const abstract_type xen_vtpm_record_abstract_type_ =
 void
 xen_vtpm_record_free(xen_vtpm_record *record)
 {
+    if (record == NULL)
+    {
+        return;
+    }
     free(record->handle);
     free(record->uuid);
     xen_vm_record_opt_free(record->vm);