Cleanup: Unused alloca definitions and includes

src/saveload/animated_tile_sl.cpp

@@ -13,7 +13,6 @@
 #include "compat/animated_tile_sl_compat.h"
 
 #include "../tile_type.h"
-#include "../core/alloc_func.hpp"
 #include "../core/smallvec_type.hpp"
 
 #include "../safeguards.h"

src/saveload/strings_sl.cpp

@@ -8,6 +8,7 @@
 /** @file strings_sl.cpp Code handling saving and loading of strings */
 
 #include "../stdafx.h"
+#include "../core/alloc_func.hpp"
 #include "../string_func.h"
 #include "../strings_func.h"
 #include "saveload_internal.h"