Fix T95323: Icon-Viewer Type Error in invoke_props_dialog()

Latest builds of Blender require WindowManager.invoke_props_dialog() to
use int explicitly in width= argument. Otherwise a TypeError will be
thrown.

Ref D14031

development_icon_get.py

@@ -469,9 +469,9 @@ class IV_OT_icons_show(bpy.types.Operator):
         self.auto_focusable = True
 
         num_cols = self.get_num_cols(len(pr.popup_icons.filtered_icons))
-        self.width = min(
+        self.width = int(min(
             ui_scale() * (num_cols * ICON_SIZE + POPUP_PADDING),
-            context.window.width - WIN_PADDING)
+            context.window.width - WIN_PADDING))
 
         return context.window_manager.invoke_props_dialog(
             self, width=self.width)