Update pre_install.lua (#14)

Author: Space2048

hooks/pre_install.lua

@@ -20,7 +20,7 @@ function PLUGIN:PreInstall(ctx)
     end
 
     if (version == nil) then
-        error("version not found for provided version " .. version)
+        error("version not found for provided version " .. (ctx.version or "null"))
     end
 
     local arch_type = RUNTIME.archType
@@ -56,4 +56,4 @@ function PLUGIN:PreInstall(ctx)
         url = baseUrl .. filename,
         sha256 = checksum,
     }
-end
+end