fix create_TheClass 欄位名稱錯誤

database/migrations/2018_07_22_192734_create_TheClass_table.php

@@ -14,7 +14,7 @@ class CreateTheClassTable extends Migration {
 	{
 		Schema::create('TheClass', function(Blueprint $table)
 		{
-			$table->integer('CID', true);
+			$table->integer('C_ID', true);
 			$table->string('name', 50)->comment('類別名稱');
 		});
 	}