made sha256.lua work with ocemu

modules/lib/sha256.lua

@@ -8,14 +8,17 @@
 -- Data card support added by https://github.com/SuPeRMiNoR2
 _G.sha = {}
 if component then
- if component.data then
-  datac = component.data
-  function sha.sha256(data)
-   local d=component.data.sha256(data)
-   return (d:gsub('.',function(c)
-    return string.format("%02x", string.byte(c))
-   end))
-  end
+ if component.data and not component.ocemu then
+  shamode = "hardware"
+ end
+end
+if shamode == "hardware" then
+ datac = component.data
+ function sha.sha256(data)
+  local d=component.data.sha256(data)
+  return (d:gsub('.',function(c)
+   return string.format("%02x", string.byte(c))
+  end))
  end
 else
 local MOD = 2^32