revision: reorder read_revisions_from_stdin()

Reorder `read_revisions_from_stdin()` so that we can start using
`handle_revision_pseudo_opt()` without a forward declaration in a
subsequent commit.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

revision.c

@@ -2195,39 +2195,6 @@ static void read_pathspec_from_stdin(struct strbuf *sb,
 		strvec_push(prune, sb->buf);
 }
 
-static void read_revisions_from_stdin(struct rev_info *revs,
-				      struct strvec *prune)
-{
-	struct strbuf sb;
-	int seen_dashdash = 0;
-	int save_warning;
-
-	save_warning = warn_on_object_refname_ambiguity;
-	warn_on_object_refname_ambiguity = 0;
-
-	strbuf_init(&sb, 1000);
-	while (strbuf_getline(&sb, stdin) != EOF) {
-		int len = sb.len;
-		if (!len)
-			break;
-		if (sb.buf[0] == '-') {
-			if (len == 2 && sb.buf[1] == '-') {
-				seen_dashdash = 1;
-				break;
-			}
-			die("options not supported in --stdin mode");
-		}
-		if (handle_revision_arg(sb.buf, revs, 0,
-					REVARG_CANNOT_BE_FILENAME))
-			die("bad revision '%s'", sb.buf);
-	}
-	if (seen_dashdash)
-		read_pathspec_from_stdin(&sb, prune);
-
-	strbuf_release(&sb);
-	warn_on_object_refname_ambiguity = save_warning;
-}
-
 static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
 {
 	append_grep_pattern(&revs->grep_filter, ptn, "command line", 0, what);
@@ -2816,6 +2783,39 @@ static int handle_revision_pseudo_opt(struct rev_info *revs,
 	return 1;
 }
 
+static void read_revisions_from_stdin(struct rev_info *revs,
+				      struct strvec *prune)
+{
+	struct strbuf sb;
+	int seen_dashdash = 0;
+	int save_warning;
+
+	save_warning = warn_on_object_refname_ambiguity;
+	warn_on_object_refname_ambiguity = 0;
+
+	strbuf_init(&sb, 1000);
+	while (strbuf_getline(&sb, stdin) != EOF) {
+		int len = sb.len;
+		if (!len)
+			break;
+		if (sb.buf[0] == '-') {
+			if (len == 2 && sb.buf[1] == '-') {
+				seen_dashdash = 1;
+				break;
+			}
+			die("options not supported in --stdin mode");
+		}
+		if (handle_revision_arg(sb.buf, revs, 0,
+					REVARG_CANNOT_BE_FILENAME))
+			die("bad revision '%s'", sb.buf);
+	}
+	if (seen_dashdash)
+		read_pathspec_from_stdin(&sb, prune);
+
+	strbuf_release(&sb);
+	warn_on_object_refname_ambiguity = save_warning;
+}
+
 static void NORETURN diagnose_missing_default(const char *def)
 {
 	int flags;