Added check for logger global before attempting to log in places where logging may occur before the logger is ready

src/shared.py

@@ -118,6 +118,7 @@ def lookupAppdataFolder():
         if "HOME" in environ:
             dataFolder = path.join(os.environ["HOME"], "Library/Application Support/", APPNAME) + '/'
         else:
+            if 'logger' in globals():
                 logger.critical('Could not find home folder, please report this message and your '
                                  'OS X version to the BitMessage Github.')
             sys.exit()
@@ -133,6 +134,7 @@ def lookupAppdataFolder():
 
         # Migrate existing data to the proper location if this is an existing install
         try:
+            if 'logger' in globals():
                 logger.info("Moving data folder to %s" % (dataFolder))
             move(path.join(environ["HOME"], ".%s" % APPNAME), dataFolder)
         except IOError: