esx_vi.c: Simplify error handling in MachineByName

The same pattern is used in lots of other places.
Also, reporting error message is not desired because all callers
check the return value and report errors on their own.
Signed-off-by: NMarcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/esx/esx_vi.c

@@ -3014,17 +3014,8 @@ esxVI_LookupVirtualMachineByName(esxVI_Context *ctx, const char *name,
         break;
     }
 
-    if (!(*virtualMachine)) {
-        if (occurrence == esxVI_Occurrence_OptionalItem) {
-            result = 0;
-
-            goto cleanup;
-        } else {
-            virReportError(VIR_ERR_NO_DOMAIN,
-                           _("Could not find domain with name '%s'"), name);
+    if (!(*virtualMachine) && occurrence != esxVI_Occurrence_OptionalItem)
         goto cleanup;
-        }
-    }
 
     result = 0;