Corrected an error pointed out by Sylvain Munaut in which the "plow"

command fails for the tutorial tut3d cell due to a missing
initialization of the cd_cellPlane record in DBCellCopyDefBody().
This was missed in the implementation of "bplane", and was not
checked because the routine is only called from the "plow" command
routines.

VERSION

@@ -1 +1 @@
-8.3.34
+8.3.35

database/DBcellsubr.c

@@ -104,7 +104,7 @@ DBDescendSubcell(use, xMask)
  *
  * Copies the contents of the CellDef pointed to by sourceDef into the
  * CellDef pointed to by destDef.  Only the planes, labels, flags,
- * use-id hash table, and bounding box are copied.
+ * cell plane, use-id hash table, and bounding box are copied.
  *
  * Results:
  *	None.
@@ -131,6 +131,8 @@ DBCellCopyDefBody(sourceDef, destDef)
     for (i = 0; i < MAXPLANES; i++)
 	destDef->cd_planes[i] = sourceDef->cd_planes[i];
 
+    destDef->cd_cellPlane = sourceDef->cd_cellPlane;
+
     /* Be careful to update parent pointers in the children of dest.
      * Don't allow interrupts to wreck this.
      */