[gnome-builder] ide: avoid setting programName to NULL

[Christian Hergert <chergert src gnome org>]

commit 3b5cdff9a50df5c14e9cfbacebaabd0fb818a09c
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jan 25 17:21:10 2018 -0800

    ide: avoid setting programName to NULL
    
    Under no situation do we want to allow that. Not that it currently
    happens, but just to be sure.

 src/libide/ide.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/libide/ide.c b/src/libide/ide.c
index 06df737cf..880305ffc 100644
--- a/src/libide/ide.c
+++ b/src/libide/ide.c
@@ -59,7 +59,8 @@ ide_set_program_name (const gchar *program_name)
       return;
     }
 
-  programName = g_intern_string (program_name);
+  if (program_name != NULL)
+    programName = g_intern_string (program_name);
 }
 
 static void