[retro-gtk] retro-core: Don't allow negative speed rate

[Adrien Plazas <aplazas src gnome org>]

commit e4974879cd788a9722f866a9d239142a8b746960
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Jan 19 17:56:23 2020 +0500

    retro-core: Don't allow negative speed rate
    
    Having speed rate <= 0 currently stops the game. While it makes sense for
    0, it can be confusing with <0, so don't allow that.

 retro-gtk/retro-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/retro-gtk/retro-core.c b/retro-gtk/retro-core.c
index 49081b1..66165d4 100644
--- a/retro-gtk/retro-core.c
+++ b/retro-gtk/retro-core.c
@@ -458,7 +458,7 @@ retro_core_class_init (RetroCoreClass *klass)
     g_param_spec_double ("speed-rate",
                          "Speed rate",
                          "The speed ratio at wich the core will run",
-                         -G_MAXDOUBLE, G_MAXDOUBLE, 1.0,
+                         0.0, G_MAXDOUBLE, 1.0,
                          G_PARAM_READWRITE |
                          G_PARAM_STATIC_NAME |
                          G_PARAM_STATIC_NICK |