fix several not tested malloc or calloc return value

common/config/config_load_configmodule.c

@@ -300,12 +300,16 @@ configmodule_interface_t *load_configmodule(int argc,
       cfgmode = strdup(CONFIG_LIBCONFIGFILE);
     }
   }
-  static configmodule_interface_t *cfgptr;
+  static configmodule_interface_t *cfgptr = NULL;
   if (cfgptr)
     fprintf(stderr, "ERROR: Call load_configmodule more than one time\n");
 
   // The macros are not thread safe print_params and similar
   cfgptr = calloc(sizeof(configmodule_interface_t), 1);
+  if (!cfgptr) {
+    fprintf(stderr, "ERROR: cannot allocate a memory for configuration\n");
+    return NULL;
+  }
   /* argv_info is used to memorize command line options which have been recognized */
   /* and to detect unrecognized command line options which might have been specified */
     cfgptr->argv_info = calloc(sizeof(int32_t), argc+10);