Prevent server 500 on compare branches with no common history (#6555) (#6558)

* Prevent server 500 on compare branches with no common history (#6555)
* Update code.gitea.io/git module

Author: zeripath

Gopkg.lock

@@ -683,6 +683,7 @@ editor.cannot_commit_to_protected_branch = Cannot commit to protected branch '%s
 
 commits.desc = Browse source code change history.
 commits.commits = Commits
+commits.no_commits = No commits in common. '%s' and '%s' have entirely different histories.
 commits.search = Search commits…
 commits.find = Search
 commits.search_all = All Branches

options/locale/locale_en-US.ini

@@ -1,9 +1,13 @@
 <h4 class="ui top attached header">
 	<div class="ui stackable grid">
-		<div class="six wide column">
-			{{.CommitCount}} {{.i18n.Tr "repo.commits.commits"}} {{if .Branch}}({{.Branch}}){{end}}
+		<div class="ten wide column">
+			{{if or .PageIsCommits (gt .CommitCount 0)}}
+				{{.CommitCount}} {{.i18n.Tr "repo.commits.commits"}} {{if .Branch}}({{.Branch}}){{end}}
+			{{else}}
+				{{.i18n.Tr "repo.commits.no_commits" $.BaseBranch $.HeadBranch }} {{if .Branch}}({{.Branch}}){{end}}
+			{{end}}
 		</div>
-		<div class="ten wide right aligned column">
+		<div class="six wide right aligned column">
 			{{if .PageIsCommits}}
 				<form class="ignore-dirty" action="{{.RepoLink}}/commits/{{.BranchNameSubURL | EscapePound}}/search">
 					<div class="ui tiny search input">
@@ -23,7 +27,7 @@
 	</div>
 </h4>
 
-{{if .Commits}}
+{{if and .Commits (gt .CommitCount 0)}}
 	<div class="ui attached table segment">
 		<table class="ui very basic striped fixed table single line" id="commits-table">
 			<thead>

templates/repo/commits_table.tmpl

@@ -54,6 +54,9 @@
 				<div class="ui segment">
 					{{.i18n.Tr "repo.pulls.has_pull_request" $.RepoLink $.RepoRelPath .PullRequest.Index | Safe}}
 				</div>
+			{{else if eq .CommitCount 0 }}
+				{{template "repo/commits_table" .}}
+				{{template "repo/diff/box" .}}
 			{{else}}
 				{{template "repo/issue/new_form" .}}
 				{{template "repo/commits_table" .}}