Init variables.

src/CMOR.cc

@@ -604,7 +604,7 @@ static int
 get_ifilevalue_code(int vlistID, const char *value, int nvars)
 {
   int code = atoi(value);
-  if ( code && code < 1000 )
+  if ( code > 0 && code < 1000 )
     {
       char newcode[4];
       sprintf(newcode, "%03d", code);
@@ -957,9 +957,9 @@ addcharvar(keyValues_t *charvars, int vlistID, const char *key, struct mapping v
     }
 
   int gridID = vlistInqVarGrid(vlistID, varIDs[0]);
-  int subgridID;
+  int subgridID = -1;
   int zaxisID = vlistInqVarZaxis(vlistID, varIDs[0]);
-  int subzaxisID;
+  int subzaxisID = -1;
   int ntsteps = vlistNtsteps(vlistID);
 
   if (cdoStreamIsPipe(0))
@@ -2834,7 +2834,7 @@ register_z_axis(list_t *kvl, int vlistID, int varID, int zaxisID, char *varname,
         }
           else if (zaxisInqType(zaxisID) == ZAXIS_HYBRID || zaxisInqType(zaxisID) == ZAXIS_HYBRID_HALF)
             {
-              double *alev_val, *alev_bnds, *ap_val, *ap_bnds, *b_val, *b_bnds;
+              double *alev_val, *alev_bnds = nullptr, *ap_val, *ap_bnds = nullptr, *b_val, *b_bnds = nullptr;
               double *p0 = (double *) Malloc(sizeof(double));
               p0[0] = 101325.0;