Fix #1338, check status of call to CFE_ES_CDS_CachePreload

Confirm that the call returned CFE_SUCCESS before continuing.

modules/es/fsw/src/cfe_es_cds.c

@@ -532,6 +532,11 @@ int32 CFE_ES_ClearCDS(void)
     /* Clear the CDS to ensure everything is gone */
     /* Create a block of zeros to write to the CDS */
     Status = CFE_ES_CDS_CachePreload(&CDS->Cache, NULL, 0, sizeof(CDS->Cache.Data.Zero));
+    if (Status != CFE_SUCCESS)
+    {
+        CFE_ES_WriteToSysLog("%s():CFE_ES_CDS_CachePreload failed, Status=0x%08X\n", __func__, (unsigned int)Status);
+        return Status;
+    }
 
     /* While there is space to write another block of zeros, then do so */
     while (CDS->Cache.Offset < CDS->TotalSize)