CA-218242: Fix crash in Dom0 memory dialog

- reset the spinner limits before changing the value

Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>

XenAdmin/Dialogs/ControlDomainMemoryDialog.cs

@@ -92,6 +92,7 @@ namespace XenAdmin.Dialogs
                     max = value;
                 if (value < min)
                     min = value;
+                memorySpinner.SetRange(0, MAXIMUM_DOM0_MEMORY_GB * Util.BINARY_GIGA); // reset spinner limits
                 memorySpinner.Initialize(Messages.CONTROL_DOMAIN_MEMORY_LABEL, null, value, max);
                 memorySpinner.SetRange(min, max);
             }