travis: fix full git repo detection in configure

configure

@@ -321,7 +321,7 @@ if [ "$compatversion" = 'y' ]; then
             curbranch=$(git rev-parse --abbrev-ref HEAD)
             curremote=$(git remote show | head -n 1)
             curnbcomm=$(git rev-list $curbranch | wc -l)
-            if [ $curnbcomm -lt 100 ]; then
+            if [ $curnbcomm -lt 250 ]; then
                repofull=0
             else
                git fetch $curremote $compatbranch || exit 1