log.lua: Shouldn't assert on failed fs.open because this way it doesn't run on read only filesystem and really doesn't matter if it fails

lib/log.lua

@@ -55,14 +55,11 @@ local logFileSizeLimit = 16384
 
 local function writeToLog(path, text)
   fs.makeDirectory("halyde/logs") -- Git likes to not clone empty directories
-  local handle
-  if fs.exists(path) then
-    handle = assert(fs.open(path, "a"))
-  else
-    handle = assert(fs.open(path, "w"))
-  end
+  local handle = fs.open(path, "a")
+  if handle then
     handle:write(text .. "\n")
     handle:close()
+  end
 
   -- Log trimming if it gets too long
   if fs.size(path) > logFileSizeLimit then