vars and project settings -- incorporating lemon tiger changes

src/hash.h

@@ -4,6 +4,9 @@
 **
 */
 
+#ifndef HASH_H
+#define HASH_H
+
 #define HTMAXSIZE 1999
 #define NOTFOUND  0
 
@@ -22,3 +25,4 @@ int 	HTfind(HTtable *, char *);
 char    *HTfindKey(HTtable *, char *);
 void	HTfree(HTtable *);
 	
+#endif

src/vars.h

@@ -150,6 +150,7 @@ EXTERN double   *D,                    /* Node actual demand           */
                 *K,                    /* Link settings                */
                 *Q,                    /* Link flows                   */
                 *R,                    /* Pipe reaction rate           */
+                *X,                    /* General purpose array        */
                 *XC;                    /* General purpose array        */
 EXTERN double   *H;                    /* Node heads                   */
 EXTERN double *QTankVolumes;