[evolution-data-server] Silently skip empty lines when reading autoconfig-variables

[Milan Crha <mcrha src gnome org>]

commit e850b56a867b1c99e236be8d14feb1b90d5bf743
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jun 4 17:17:11 2018 +0200

    Silently skip empty lines when reading autoconfig-variables

 .../evolution-source-registry/evolution-source-registry-autoconfig.c   | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/services/evolution-source-registry/evolution-source-registry-autoconfig.c 
b/src/services/evolution-source-registry/evolution-source-registry-autoconfig.c
index f3f9810d8..6f03053d6 100644
--- a/src/services/evolution-source-registry/evolution-source-registry-autoconfig.c
+++ b/src/services/evolution-source-registry/evolution-source-registry-autoconfig.c
@@ -662,6 +662,9 @@ e_autoconfig_read_user_variables (GSettings *settings)
                const gchar *line = strv[ii];
                gchar *name, *value, *sep;
 
+               if (!*line)
+                       continue;
+
                sep = strchr (line, '=');
                if (!sep || sep == line) {
                        e_source_registry_debug_print ("Autoconfig: GSettings' autoconfig-variables line '%s' 
doesn't conform format 'name=value'.\n", line);