[gimp] app: fix Gimp-Config warning Can't tell anything about a gint64.

[Jacob Boerema <jboerema src gnome org>]

commit 206bc06eabdaff85cc6246724ea51244ce757df1
Author: Jacob Boerema <jgboerema gmail com>
Date:   Wed Sep 29 16:45:10 2021 -0400

    app: fix Gimp-Config warning Can't tell anything about a gint64.
    
    When running gimp-console-2.99.exe --dump-gimprc-system we get two
    warnings:
    (gimp-console-2.99.exe:23000): Gimp-Config-WARNING **: 16:08:29.604:
     FIXME: Can't tell anything about a gint64.
    
    Let's fix this by adding G_TYPE_INT64 as a known integer value.

 app/config/gimpconfig-dump.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/app/config/gimpconfig-dump.c b/app/config/gimpconfig-dump.c
index e8174490c6..014d8a0972 100644
--- a/app/config/gimpconfig-dump.c
+++ b/app/config/gimpconfig-dump.c
@@ -528,6 +528,7 @@ dump_describe_param (GParamSpec *param_spec)
         case G_TYPE_UINT:
         case G_TYPE_LONG:
         case G_TYPE_ULONG:
+        case G_TYPE_INT64:
           values = "This is an integer value.";
           break;
         case G_TYPE_FLOAT: