Fix fuzzy match without no partial match

lua/cmp/matcher.lua

@@ -128,7 +128,17 @@ matcher.match = function(input, word, option)
   end
 
   if #matches == 0 then
-    return 0, {}
+    matches = {
+      {
+        index = 1,
+        input_match_start = 1,
+        input_match_end = 1,
+        word_match_start = 1,
+        word_match_end = 1,
+        strict_ratio = 0,
+        fuzzy = false,
+      }
+    }
   end
 
   matcher.debug(word, matches)

lua/cmp/matcher_spec.lua

@@ -36,6 +36,13 @@ describe('matcher', function()
 
     assert.is.truthy(matcher.match('Unit', 'net.UnixListener', { disallow_partial_fuzzy_matching = true }) == 0)
     assert.is.truthy(matcher.match('Unit', 'net.UnixListener', { disallow_partial_fuzzy_matching = false }) >= 1)
+
+    assert.is.truthy(matcher.match('tail', 'HCDetails', {
+      disallow_fuzzy_matching = false,
+      disallow_partial_matching = false,
+      disallow_prefix_unmatching = false,
+      disallow_partial_fuzzy_matching = false,
+    }) >= 1)
   end)
 
   it('disallow_fuzzy_matching', function()