getTranslation: new msgid w/o context should return msgid

When msgid has multiple context and does not have no-context fallback
with empty string ("") context, gettext(msgid) returns "undefined".
It should return msgid instead to be consistent with "untranslated"
behavior.

src/translate.js

@@ -89,9 +89,9 @@ const translate = {
     }
 
     // Avoid a crash when a msgid exists with and without a context, see #32.
-    if (!(translated instanceof Array) && translated.hasOwnProperty('')) {
+    if (typeof translated === 'object' && !(translated instanceof Array)) {
       // As things currently stand, the void key means a void context for easygettext.
-      translated = translated['']
+      translated = translated.hasOwnProperty('') ? translated[''] : untranslated
     }
 
     if (typeof translated === 'string') {

test/specs/translate.spec.js

@@ -88,9 +88,11 @@ describe('Translate tests', () => {
 
     Vue.config.language = 'fr_FR'
     expect(undetectableGettext('Pending')).to.equal('En cours')
+    expect(undetectableGettext('Answer')).to.equal('Answer')
 
     Vue.config.language = 'en_US'
     expect(undetectableGettext('Pending')).to.equal('Pending')
+    expect(undetectableGettext('Answer')).to.equal('Answer')
 
     expect(undetectableGettext('Pending', 'fr_FR')).to.equal('En cours')
   })
@@ -268,9 +270,11 @@ describe('Translate tests without Vue', () => {
 
     config.language = 'fr_FR'
     expect(undetectableGettext('Pending')).to.equal('En cours')
+    expect(undetectableGettext('Answer')).to.equal('Answer')
 
     config.language = 'en_US'
     expect(undetectableGettext('Pending')).to.equal('Pending')
+    expect(undetectableGettext('Answer')).to.equal('Answer')
 
     expect(undetectableGettext('Pending', 'fr_FR')).to.equal('En cours')
   })