vlistVarCompare: cast one operand to int.

src/vlist_var.c

@@ -1559,7 +1559,7 @@ vlistVarCompare(vlist_t *a, int varIDA, vlist_t *b, int varIDB)
 #define FCMPFLT(f) (IS_NOT_EQUAL((pva->f), (pvb->f)))
 #define FCMPSTR(fs) ((pva->fs) != (pvb->fs) && strcmp((pva->fs), (pvb->fs)))
 #define FCMP2(f) (namespaceResHDecode(pva->f).idx != namespaceResHDecode(pvb->f).idx)
-  int diff = FCMP(fvarID) | FCMP(mvarID) | FCMP(flag) | FCMP(param) | FCMP(datatype) | FCMP(timetype) | FCMP(tsteptype)
+  int diff = (int)FCMP(fvarID) | FCMP(mvarID) | FCMP(flag) | FCMP(param) | FCMP(datatype) | FCMP(timetype) | FCMP(tsteptype)
              | FCMP(xyz) | FCMP2(gridID) | FCMP2(zaxisID) | FCMP2(instID) | FCMP2(modelID) | FCMP2(tableID)
              | FCMP(missvalused) | FCMPFLT(missval) | FCMPFLT(addoffset) | FCMPFLT(scalefactor) | FCMPSTR(extra) | FCMP(comptype)
              | FCMP(complevel) | FCMP(lvalidrange) | FCMPFLT(validrange[0]) | FCMPFLT(validrange[1]);