Make only optional use of aliased function Coord_GroupSystem().

git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/IOASCII/trunk@199 94b1c47f-dcfd-45ef-a468-0854c0e9e350

1 files changed, 12 insertions, 8 deletions

diff --git a/src/Write1D.c b/src/Write1D.c
index 999e583..7779c86 100644
--- a/src/Write1D.c
+++ b/src/Write1D.c
@@ -191,16 +191,20 @@ int IOASCII_Write1D (const cGH *GH, int vindex, const char *alias)
     return (0);
   }
 
-  /* get the coordinate system associated with this grid variable */
-  groupname = CCTK_GroupName (gindex);
-  coord_system_handle = Coord_GroupSystem (GH, groupname);
-  free (groupname);
-
   dir = gdata.dim < 3 ? gdata.dim : 3;
 
-  have_coords = coord_system_handle >= 0 &&
-                Util_TableGetIntArray (coord_system_handle, dir,
-                                       coord_handles, "COORDINATES") >= 0;
+  have_coords = CCTK_IsFunctionAliased ("Coord_GroupSystem");
+  if (have_coords)
+  {
+    /* get the coordinate system associated with this grid variable */
+    groupname = CCTK_GroupName (gindex);
+    coord_system_handle = Coord_GroupSystem (GH, groupname);
+    free (groupname);
+
+    have_coords = coord_system_handle >= 0 &&
+                  Util_TableGetIntArray (coord_system_handle, dir,
+                                         coord_handles, "COORDINATES") >= 0;
+  }
   if (have_coords)
   {
     /* get the coordinate functions and coordinate physical minimum */