diglib: fix doxygen

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@56239 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/vector/diglib/struct_alloc.c

@@ -1,7 +1,7 @@
 /*!
-  \file lib/vector/diglib/plus_node.c
+  \file lib/vector/diglib/struct_alloc.c
  
-  \brief Vector library - update topo for nodes (lower level functions)
+  \brief Vector library - allocate and zero array space (lower level functions)
   
   Lower level functions for reading/writing/manipulating vectors.