Fix globals.set (#635)

* Fix globals.set

* Update __init__.py

esphome/components/globals/__init__.py

@@ -50,6 +50,7 @@ def globals_set_to_code(config, action_id, template_arg, args):
     full_id, paren = yield cg.get_variable_with_full_id(config[CONF_ID])
     template_arg = cg.TemplateArguments(full_id.type, *template_arg)
     var = cg.new_Pvariable(action_id, template_arg, paren)
-    templ = yield cg.templatable(config[CONF_VALUE], args, None)
+    templ = yield cg.templatable(config[CONF_VALUE], args, None,
+                                 to_exp=cg.RawExpression)
     cg.add(var.set_value(templ))
     yield var

tests/test1.yaml

@@ -1277,6 +1277,9 @@ text_sensor:
       id: template_text
       state: |-
         return "Hello World2";
+  - globals.set:
+      id: glob_int
+      value: '0'
 - platform: template
   name: Template Text Sensor
   id: template_text