Fix the loading of invalid binary algorithms

An invalid binary algorithm being one for which no shared library has been uploaded yet

beat/core/algorithm.py

@@ -337,9 +337,10 @@ class Algorithm(object):
 
     if self.storage is not None: #loading from the disk, check code
       if not self.storage.code.exists():
-        self.errors.append('Algorithm code not found: %s' % \
-                self.storage.code.path)
-        return
+        if self.data['language'] != 'cxx':
+          self.errors.append('Algorithm code not found: %s' % \
+                  self.storage.code.path)
+          return
       else:
         code = self.storage.code.load()