[tracker-miners: 2/4] add error messages in case of unknown GPS ref format

[Sam Thursfield <sthursfield src gnome org>]

commit ec89eb5eaa989ba08f6197282def6d124bed6da7
Author: Viktor Gal <viktor gal maeth com>
Date:   Mon Feb 3 09:40:43 2020 +0100

    add error messages in case of unknown GPS ref format

 src/libtracker-extract/tracker-exif.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/libtracker-extract/tracker-exif.c b/src/libtracker-extract/tracker-exif.c
index e0838e11c..ade5c66ed 100644
--- a/src/libtracker-extract/tracker-exif.c
+++ b/src/libtracker-extract/tracker-exif.c
@@ -335,6 +335,9 @@ get_gps_coordinate (ExifData *exif,
                                if (refentry->data[0] == 'S' || refentry->data[0] == 'W') {
                                        f = -1 * f;
                                }
+                       } else {
+                               g_error("Invalid GPS Ref entry!");
+                               return NULL;
                        }
 
                        return g_strdup_printf ("%f", f);