lua fix yellow and add temploader

temp loader allows some lua requires to be loaded and
later garbage collected unfortunately the module needs to be formatted
in such a way to pass back a call table in order to keep the functions
within from being garbage collected too early

BE AWARE this bypasses the module loader which would allow code reuse
so if you aren't careful this memory saving tool could spell disaster
for free RAM if you load the same code multiple times

Change-Id: I0b6f81e481b8c779edbd620c8403794f8353926f

1 files changed, 6 insertions, 2 deletions

diff --git a/apps/plugins/lua/rocklib.c b/apps/plugins/lua/rocklib.c
index 050fbc73b2..2672d446fc 100644
--- a/apps/plugins/lua/rocklib.c
+++ b/apps/plugins/lua/rocklib.c
@@ -153,7 +153,7 @@ RB_WRAP(kbd_input)
 
     const char *input = lua_tostring(L, 1);
     size_t layout_len;
-    const char *layout = lua_tolstring(L, 2, &layout_len);
+    const unsigned char *layout = lua_tolstring(L, 2, &layout_len);
     char *buffer = luaL_prepbuffer(&b);
 
     if(input != NULL)
@@ -161,8 +161,12 @@ RB_WRAP(kbd_input)
     else
         buffer[0] = '\0';
 
-    if(layout_len <= 1 || (unsigned short)layout[layout_len - 1] != 0xFFFE)
+    if(layout_len <= 2 ||
+       layout[layout_len - 1] != 0xFE ||
+       layout[layout_len - 2] != 0xFF)
+    {
         layout = NULL;
+    }
 
     if(!rb->kbd_input(buffer, LUAL_BUFFERSIZE, (unsigned short *)layout))
     {