ui-log: honor id=sha1 on querystring

This teaches ui-log to prefer id=sha1 and fallback to h=rev if no id-
parameter is specified. With this change, summary, log, commit and tree
views now passes current branch using h parameter and current revision
using id parameter.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.c

@@ -92,7 +92,7 @@ static void cgit_print_repo_page(struct cacheitem *item)
 
 	switch(cgit_cmd) {
 	case CMD_LOG:
-		cgit_print_log(cgit_query_head, cgit_query_ofs,
+		cgit_print_log(cgit_query_sha1, cgit_query_ofs,
 			       cgit_max_commit_count, cgit_query_search,
 			       cgit_query_path, 1);
 		break;

ui-log.c

@@ -59,6 +59,9 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *path, i
 	int argc = 2;
 	int i;
 
+	if (!tip)
+		argv[1] = cgit_query_head;
+
 	if (grep)
 		argv[argc++] = fmt("--grep=%s", grep);
 	if (path) {