Merge pull request #12662 from eliasp/win_repo-empty-productname

Fix numerous crashes in consumers of Windows package lists due to empty package names.

salt/modules/win_pkg.py

@@ -376,7 +376,10 @@ def _get_reg_software():
                     "DisplayVersion")
                 if name not in ignore_list:
                     if prd_name != 'Not Found':
-                        reg_software[prd_name] = prd_ver
+                        # some MS Office updates don't register a product name which means
+                        # their information is useless
+                        if prd_name != '':
+                            reg_software[prd_name] = prd_ver
     return reg_software