Corrected CalmaRead to remove a syntax error that managed to end up in

the last commit, unfortunately.  Thanks to Matt Guthaus for alerting me
to this.  Also updated parts of the extresist code that remove the
dependence on ResConDCS;  this is a minor update and should not affect
the operation of extresist.  It is preparatory to doing more work to
support additional device types like capacitors, bipolars, and diodes.

resis/resis.h

@@ -247,6 +247,7 @@ typedef struct resdevtile
      struct resdevtile	*nextDev;
      Rect		area;
      TileType		type;
+     ExtDevice		*devptr;
      int		perim;
      int		overlap;
 } ResDevTile;
@@ -297,7 +298,8 @@ typedef struct rdev
      Point		location;	/* Location of lower left point of */
      					/* device.			   */
      float		resistance;     /* "Resistance" of device.	   */
-     int		rs_ttype;	/* device type			   */
+     TileType		rs_ttype;	/* tile type for device		   */
+     ExtDevice		*rs_devptr;	/* device extraction record	   */
      char               *rs_gattr;      /* Gate attributes, if any         */
      char               *rs_sattr;
      char               *rs_dattr;