[tracker-miners/wip/carlosg/coverity-fixes: 7/28] tracker-extract: Move variable initialization

[Carlos Garnacho <carlosg src gnome org>]

commit e7e3bfde730f13d965176751dcfd0776f70c1c2a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Oct 24 00:23:28 2021 +0200

    tracker-extract: Move variable initialization
    
    Otherwise it could be leaked in between, due to early returns.
    
    CID: #365650

 src/tracker-extract/tracker-extract-png.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-png.c b/src/tracker-extract/tracker-extract-png.c
index c793b968e..a5635f1c5 100644
--- a/src/tracker-extract/tracker-extract-png.c
+++ b/src/tracker-extract/tracker-extract-png.c
@@ -139,14 +139,13 @@ raw_profile_new (const gchar *input,
                size++;
        } while (g_ascii_isdigit (*ptr));
 
-       length_str = g_strndup (length_ptr, size - 1);
-
        if (*ptr != '\n') {
                return NULL;
        }
 
        ptr++;
 
+       length_str = g_strndup (length_ptr, size - 1);
        length = atoi (length_str);
        g_free (length_str);