don't display changing layout message if layout not changed

MWSE/mods/Keyboard Layout Changer/common.lua

@@ -13,16 +13,19 @@ this.modInfo = "Allows use of non-qwerty keyboard layouts.\n\nCurrently supporte
 
 function this.log(str) mwse.log("[%s] %s", this.modName, str) end
 
-function this.changeLayout(layout)
+function this.changedLayout(layout)
+    local changed = false
     if keys[layout] and (#keys[layout].lowercase == 256 and #keys[layout].uppercase == 256) then
         -- Thanks NullCascade
         mwse.memory.writeBytes({address = 0x775148, bytes = keys[layout].lowercase})
         mwse.memory.writeBytes({address = 0x775248, bytes = keys[layout].uppercase})
+        changed = true
     else
         local message = "Bad keys.lua file, please re-install."
         this.log(message)
         tes3.messageBox(string.format("(%s) %s", this.modName, message))
     end
+    return changed
 end
 
 return this

MWSE/mods/Keyboard Layout Changer/main.lua

@@ -2,8 +2,9 @@ local common = require("Keyboard Layout Changer.common")
 local config = require("Keyboard Layout Changer.config").getConfig()
 
 local function onInitialized()
-    common.log("Changing layout to " .. config.keyboardLayout)
-    common.changeLayout(config.keyboardLayout)
+    if common.changedLayout(config.keyboardLayout) then
+        common.log("Changed layout to " .. config.keyboardLayout)
+    end
 end
 
 event.register("initialized", onInitialized)

MWSE/mods/Keyboard Layout Changer/mcm.lua

@@ -25,10 +25,11 @@ local function createOptions()
 end
 
 local function applyLayout()
-    local message = "Changing layout to " .. config.keyboardLayout
-    tes3.messageBox(message)
-    common.log(message)
-    common.changeLayout(config.keyboardLayout)
+    if common.changedLayout(config.keyboardLayout) then
+        local message = "Changed layout to " .. config.keyboardLayout
+        tes3.messageBox(message)
+        common.log(message)
+    end
 end
 
 local template = mwse.mcm.createTemplate(common.modName)