make type-check happy

Author: sumneko

script/file-uri.lua

@@ -49,7 +49,7 @@ function m.encode(path)
 
     --lower-case windows drive letters in /C:/fff or C:/fff
     local start, finish, drive = path:find '/(%u):'
-    if drive then
+    if drive and finish then
         path = path:sub(1, start) .. drive:lower() .. path:sub(finish, -1)
     end
 

script/parser/compile.lua

@@ -470,7 +470,7 @@ end
 
 local function parseLongString()
     local start, finish, mark = sfind(Lua, '^(%[%=*%[)', Tokens[Index])
-    if not mark then
+    if not start then
         return nil
     end
     fastForwardToken(finish + 1)