Fix restoring of saved environment for non-Alire projects

For eng/ide/gnatstudio#30

Author: AnthonyLeonardoGracio

share/support/core/alire.py

@@ -113,7 +113,7 @@ def on_project_changing(hook, file):
     """
     global saved_env, project_to_reload
 
-    if project_to_reload or "ALIRE" in os.environ:
+    if project_to_reload:
         project_to_reload = None
         return