Change logLevel in isSetup from error to warn. Error stops processing, and perhaps should be prohibited by logDebug. Fixes functionnal proble with the merge of getsentry#364

Author: benoitg

src/raven.js

@@ -787,7 +787,7 @@ function isSetup() {
     if (!hasJSON) return false;  // needs JSON support
     if (!globalServer) {
         if (!ravenNotConfiguredError)
-          logDebug('error', 'Error: Raven has not been configured.');
+          logDebug('warn', 'Warning: Raven has not been configured.');
         ravenNotConfiguredError = true;
         return false;
     }

test/raven.test.js

@@ -308,7 +308,7 @@ describe('globals', function() {
             globalServer = undefined;
             isSetup();
             isSetup();
-            assert.isTrue(window.logDebug.calledWith('error', 'Error: Raven has not been configured.'))
+            assert.isTrue(window.logDebug.calledWith('warn', 'Warning: Raven has not been configured.'))
             assert.isTrue(window.logDebug.calledOnce);
           });
         });