[gnumeric] compilation: silence a warning.

[Morten Welinder <mortenw src gnome org>]

commit 9e4c82697ceebc753fd701a903b8bbb41a34d172
Author: Morten Welinder <terra gnome org>
Date:   Sat Nov 2 20:19:41 2019 -0400

    compilation: silence a warning.

 ChangeLog    |  5 +++++
 src/gutils.c | 17 +++++++++--------
 2 files changed, 14 insertions(+), 8 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index cd33af350..c72f50044 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2019-11-02  Morten Welinder  <terra gnome org>
+
+       * src/gutils.c (gnm_file_saver_common_export_option): Reorganize a
+       bit to silence warning.
+
 2019-10-31  Morten Welinder  <terra gnome org>
 
        * src/cell.c (gnm_cell_get_text_for_editing): Avoid excess
diff --git a/src/gutils.c b/src/gutils.c
index 18031f659..4971427ef 100644
--- a/src/gutils.c
+++ b/src/gutils.c
@@ -955,7 +955,7 @@ gnm_file_saver_common_export_option (GOFileSaver const *fs,
        if (strcmp (key, "sheet") == 0 ||
            strcmp (key, "active-sheet") == 0) {
                GPtrArray *sheets;
-               Sheet *sheet;
+               Sheet *sheet = NULL;
 
                if (key[0] == 'a') {
                        // Not ideal -- we lack a view here
@@ -964,13 +964,14 @@ gnm_file_saver_common_export_option (GOFileSaver const *fs,
                                });
                } else {
                        sheet = workbook_sheet_by_name (wb, value);
-                       if (!sheet) {
-                               if (err)
-                                       *err = g_error_new (go_error_invalid (), 0,
-                                                           _("Unknown sheet \"%s\""),
-                                                           value);
-                               return TRUE;
-                       }
+               }
+
+               if (!sheet) {
+                       if (err)
+                               *err = g_error_new (go_error_invalid (), 0,
+                                                   _("Unknown sheet \"%s\""),
+                                                   value);
+                       return TRUE;
                }
 
                sheets = g_object_get_data (G_OBJECT (wb), SSCONVERT_SHEET_SET_KEY);