lsp: check state after checking debug mode

Fixes fatih#3618

Author: bhcleek

autoload/go/lsp.vim

@@ -1332,6 +1332,11 @@ let s:logtimer = 0
 function! s:debugasync(timer) abort
   let s:logtimer = 0
 
+  if !go#util#HasDebug('lsp')
+    let s:log = []
+    return
+  endif
+
   " set the timer to try again if Vim is in a state where we don't want to
   " change the window.
   let l:state = state('a')
@@ -1341,11 +1346,6 @@ function! s:debugasync(timer) abort
     return
   endif
 
-  if !go#util#HasDebug('lsp')
-    let s:log = []
-    return
-  endif
-
   try
     let l:winid = win_getid()