[PATCH] honor --author even with --amend, -C, and -c.

Earlier code discarded GIT_AUTHOR_DATE taken from the base
commit when --author was specified.  This was often wrong as
that use is likely to fix the spelling of author's name.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/git-commit.sh b/git-commit.sh
index e23918c..6f4dcdb 100755
--- a/git-commit.sh
+++ b/git-commit.sh
@@ -462,15 +462,7 @@
 fi >>"$GIT_DIR"/COMMIT_EDITMSG
 
 # Author
-if test '' != "$force_author"
-then
-	GIT_AUTHOR_NAME=`expr "z$force_author" : 'z\(.*[^ ]\) *<.*'` &&
-	GIT_AUTHOR_EMAIL=`expr "z$force_author" : '.*\(<.*\)'` &&
-	test '' != "$GIT_AUTHOR_NAME" &&
-	test '' != "$GIT_AUTHOR_EMAIL" ||
-	die "malformed --author parameter"
-	export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL
-elif test '' != "$use_commit"
+if test '' != "$use_commit"
 then
 	pick_author_script='
 	/^author /{
@@ -501,6 +493,15 @@
 	export GIT_AUTHOR_EMAIL
 	export GIT_AUTHOR_DATE
 fi
+if test '' != "$force_author"
+then
+	GIT_AUTHOR_NAME=`expr "z$force_author" : 'z\(.*[^ ]\) *<.*'` &&
+	GIT_AUTHOR_EMAIL=`expr "z$force_author" : '.*\(<.*\)'` &&
+	test '' != "$GIT_AUTHOR_NAME" &&
+	test '' != "$GIT_AUTHOR_EMAIL" ||
+	die "malformed --author parameter"
+	export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL
+fi
 
 PARENTS="-p HEAD"
 if test -z "$initial_commit"