[evince] comics: Prevent return of uninitialised variable

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 8be5ccf0aef9fc6965a1f5859ff4535b1e23dc61
Author: astian <astian eclipso at>
Date:   Tue Aug 1 13:34:17 2017 +0000

    comics: Prevent return of uninitialised variable
    
    GCC is right:
      backend/comics/comics-document.c: In function ‘comics_document_list’:
      backend/comics/comics-document.c:155:9: warning: ‘array’ may be used
      uninitialized in this function [-Wmaybe-uninitialized]
        return array;
               ^~~~~
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785762

 backend/comics/comics-document.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/backend/comics/comics-document.c b/backend/comics/comics-document.c
index 0725dff..cc86453 100644
--- a/backend/comics/comics-document.c
+++ b/backend/comics/comics-document.c
@@ -83,7 +83,7 @@ static GPtrArray *
 comics_document_list (ComicsDocument  *comics_document,
                      GError         **error)
 {
-       GPtrArray *array;
+       GPtrArray *array = NULL;
        gboolean has_encrypted_files;
        GSList *supported_extensions;