expr: operators return 0 for arithmetics on constants [Bug #5875]

ChangeLog

@@ -3,6 +3,10 @@
 	* using CDI library version 1.7.0
 	* Version 1.7.0 released
 
+2015-06-10  Karl-Hermann Wieners
+
+	* expr: operators return 0 for arithmetics on constants [Bug #5875]
+
 2015-06-03  Uwe Schulzweida
 
 	* removed flag CMP_CODE

NEWS

@@ -13,6 +13,7 @@ Version 1.7.0 (28 October 2015):
    Changed operators:
      * vertvar, vertstd: changed to weighted var/std if layer bounds are available
    Fixed bugs:
+     * expr: operators return 0 for arithmetics on constants [Bug #5875]
      * env. CDO_TIMESTAT_DATE does not work [Bug #5758]
      * splityear*: support for constant fields is missing [Bug #5759]
      * yseaspctl: check of verification date failed [Bug #5810]

src/expr.c

@@ -103,6 +103,8 @@ nodeType *expr_con_con(int oper, nodeType *p1, nodeType *p2)
     default:   cdoAbort("%s: operator %c unsupported!", __func__, oper); break;
     }
 
+  p->u.con.value = cval1;
+
   return (p);
 }