made sha256.lua behave on plain lua

modules/lib/sha256.lua

@@ -6,8 +6,9 @@
 --  Found Here: https://bitbucket.org/Boolsheet/bslf/src/1ee664885805/bit.lua
 --
 -- Data card support added by https://github.com/SuPeRMiNoR2
-sha = {}
-if component.data then
+_G.sha = {}
+if component then
+ if component.data then
   datac = component.data
   function sha.sha256(data)
    local d=component.data.sha256(data)
@@ -15,6 +16,7 @@ if component.data then
     return string.format("%02x", string.byte(c))
    end))
   end
+ end
 else
 local MOD = 2^32
 local MODM = MOD-1