Don't search the same term twice

We have searched for the first term in the phrase query already so we
can skip it. Before doing so we have to add the location of the first
term.

search/searcher/search_phrase.go

@@ -110,8 +110,9 @@ func (s *PhraseSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch,
 		OUTER:
 			for _, location := range locations {
 				crvtlm := make(search.TermLocationMap, 0)
+				crvtlm.AddLocation(firstTerm, location)
 			INNER:
-				for i := 0; i < len(s.terms); i++ {
+				for i := 1; i < len(s.terms); i++ {
 					nextTerm := s.terms[i]
 					if nextTerm == "" {
 						continue