LibLink/Append: tweak asserts in main BKE link/append functions.

Now that those functions are much widely used, just return early in case
there is nothing to link/append,  instead of asserting over it.

1 files changed, 12 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/blendfile_link_append.c b/source/blender/blenkernel/intern/blendfile_link_append.c
index 17c44bbd5f5..933083efe40 100644
--- a/source/blender/blenkernel/intern/blendfile_link_append.c
+++ b/source/blender/blenkernel/intern/blendfile_link_append.c
@@ -914,6 +914,11 @@ static int foreach_libblock_link_append_callback(LibraryIDLinkCallbackData *cb_d
  * Then we can heavily simplify #BKE_library_make_local(). */
 void BKE_blendfile_append(BlendfileLinkAppendContext *lapp_context, ReportList *reports)
 {
+  if (lapp_context->num_items == 0) {
+    /* Nothing to append. */
+    return;
+  }
+
   Main *bmain = lapp_context->params->bmain;
 
   BLI_assert((lapp_context->params->flag & FILE_LINK) == 0);
@@ -1183,14 +1188,19 @@ void BKE_blendfile_append(BlendfileLinkAppendContext *lapp_context, ReportList *
 
 void BKE_blendfile_link(BlendfileLinkAppendContext *lapp_context, ReportList *reports)
 {
+  if (lapp_context->num_items == 0) {
+    /* Nothing to be linked. */
+    return;
+  }
+
+  BLI_assert(lapp_context->num_libraries != 0);
+
   Main *mainl;
   Library *lib;
 
   LinkNode *liblink, *itemlink;
   int lib_idx, item_idx;
 
-  BLI_assert(lapp_context->num_items && lapp_context->num_libraries);
-
   for (lib_idx = 0, liblink = lapp_context->libraries.list; liblink;
        lib_idx++, liblink = liblink->next) {
     BlendfileLinkAppendContextLibrary *lib_context = liblink->link;