Fix warnings of unused varisables when !ENABLE_UI

src/app/commands/cmd_export_sprite_sheet.cpp

@@ -1185,7 +1185,6 @@ bool ExportSpriteSheetCommand::onEnabled(Context* context)
 void ExportSpriteSheetCommand::onExecute(Context* context)
 {
   Site site = context->activeSite();
-  Doc* document = site.document();
   auto& params = this->params();
   DocExporter exporter;
 
@@ -1197,6 +1196,7 @@ void ExportSpriteSheetCommand::onExecute(Context* context)
   // and when the Preferences::m_docs collection is iterated to save
   // all DocumentPreferences, it accesses an invalid Doc* pointer (an
   // already removed/deleted document).
+  Doc* document = site.document();
   DocumentPreferences& docPref(Preferences::instance().document(document));
 
   // Show UI if the user specified it explicitly (params.ui=true) or

src/app/script/security.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2019  Igara Studio S.A.
 // Copyright (C) 2018  David Capello
 //
 // This program is distributed under the terms of
@@ -31,6 +32,7 @@
 namespace app {
 namespace script {
 
+#ifdef ENABLE_UI
 namespace {
 
 // Map from .lua file name -> sha1
@@ -65,6 +67,7 @@ std::string get_script_filename(lua_State* L)
 }
 
 } // anonymous namespace
+#endif // ENABLE_UI
 
 int secure_io_open(lua_State* L)
 {

src/app/transaction.cpp

@@ -90,7 +90,9 @@ void Transaction::commit()
   TX_TRACE("TX: Commit <%s>\n", m_cmds->label().c_str());
 
   m_cmds->updateSpritePositionAfter();
+#ifdef ENABLE_UI
   const SpritePosition sprPos = m_cmds->spritePositionAfterExecute();
+#endif
 
   m_undo->add(m_cmds);
   m_cmds = nullptr;