vlistCopyFlag: Copy all attributes (bug fix).

src/vlist.c

@@ -706,6 +706,8 @@ void vlistCopyFlag(int vlistID2, int vlistID1)
 
                 if ( zaxisType == ZAXIS_GENERIC ) zaxisDefLtype(zaxisID2, zaxisInqLtype(zaxisID));
 
+                cdiCopyAtts(zaxisID, CDI_GLOBAL, zaxisID2, CDI_GLOBAL);
+
 		zaxisID = zaxisID2;
 		vars2[varID2].zaxisID = zaxisID2;
 	      }

src/zaxis.c

@@ -1406,6 +1406,8 @@ int zaxisDuplicate(int zaxisID)
         }
     }
 
+  cdiCopyAtts(zaxisID, CDI_GLOBAL, zaxisIDnew, CDI_GLOBAL);
+
   return zaxisIDnew;
 }