Don't crash when packageOperations is empty

src/modules/packages/main.py

@@ -76,8 +76,9 @@ def run():
     for entry in operations:
         run_operations(pkgman, entry)
 
-    operations = libcalamares.globalstorage.value("packageOperations")
+    if libcalamares.globalstorage.contains("pagkageOperations"):
-    for entry in operations:
+        operations = libcalamares.globalstorage.value("packageOperations")
-        run_operations(pkgman, entry)
+        for entry in operations:
+            run_operations(pkgman, entry)
 
     return None