Fix a few issues with missing or incorrect prototypes

There are a few places we either don't have a variable or
function prototype and need one, or we have one and they
don't match.

cif/CIFgen.c

@@ -39,6 +39,7 @@ static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/
 #include "utils/stack.h"
 #include "utils/malloc.h"
 #include "utils/maxrect.h"
+#include "drc/drc.h"
 
 /* TRUE to run (very slow) algorithm for optimizing non-manhattan tiles */
 /* (cuts size of output;  see also the GDS "merge" option)		*/

drc/DRCtech.c

@@ -38,6 +38,7 @@ static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/
 #include "utils/malloc.h"
 #include "cif/cif.h"
 #include "cif/CIFint.h"
+#include "drc/drc.h"
 
 CIFStyle *drcCifStyle = NULL;
 bool	 DRCForceReload = FALSE;

drc/drc.h

@@ -281,6 +281,8 @@ extern void DRCPrintStyle();
 extern void DRCSetStyle();
 extern void DRCLoadStyle();
 
+extern PlaneMask CoincidentPlanes(TileTypeBitMask *typeMask, PlaneMask pmask);
+
 /* The following macro can be used by the outside world to see if
  * the background checker needs to be called.
  */

extract/ExtSubtree.c

@@ -65,11 +65,11 @@ extern Node *extHierNewNode();
 extern ExtTree *extHierNewOne();
 
 /* Global data incremented by extSubtree() */
-int extSubtreeTotalArea;	/* Total area of cell */
-int extSubtreeInteractionArea;	/* Total area of all interactions, counting the
+long extSubtreeTotalArea;	/* Total area of cell */
+long extSubtreeInteractionArea;	/* Total area of all interactions, counting the
 				 * entire area of the interaction each time.
 				 */
-int extSubtreeClippedArea;	/* Total area of all interactions, counting only
+long extSubtreeClippedArea;	/* Total area of all interactions, counting only
 				 * the area that lies inside each chunk, so no
 				 * area is counted more than once.
 				 */

lef/lefTech.c

@@ -37,6 +37,7 @@ static char rcsid[] __attribute__ ((unused)) = "$Header$";
 #include "utils/malloc.h"
 #include "lef/lefInt.h"
 #include "drc/drc.h"
+#include "cif/cif.h"
 
 /* ---------------------------------------------------------------------*/