Fix env buffer parsing

envbuffer.py

@@ -24,8 +24,7 @@ class EnvBuffer():
     self.delim = delim
     self.crc_prefix = crc_prefix
     self.var = {}
-    if data is None:
-      return
+    if data is not None:
       prefix_len = 4 if crc_prefix else 0
       if isinstance(data, str):
         self.var = self.parse_env(data, delim)
@@ -67,9 +66,9 @@ class EnvBuffer():
       if x == 0:
         continue
       if x >= 1:
-        key = s[0:x]
-        val = s[x+1:]
-        dict[key.strip()] = val.strip()
+        key = (s[0:x]).strip()
+        if key:
+          dict[key] = (s[x+1:]).strip()
       else:
         dict[s.strip()] = None
     return dict