#376 Use the window ID for a given buffer for setting the loclist

test/test_setting_loclist_from_another_buffer.vader

@@ -0,0 +1,13 @@
+Before:
+  let g:original_buffer = bufnr('%')
+  new
+
+After:
+  unlet! g:original_buffer
+
+Execute(Errors should be set in the loclist for the original buffer, not the new one):
+  call ale#list#SetLists(g:original_buffer, [{'lnum': 4, 'text': 'foo'}])
+
+  AssertEqual [], getloclist(0)
+  AssertEqual 1, len(getloclist(bufwinid(g:original_buffer)))
+  AssertEqual 'foo', getloclist(bufwinid(g:original_buffer))[0].text