[common] Fix candidate filtering.

The filtering was done on the thruthiness of the symbol
string content.

beat/cmdline/common.py

@@ -1283,7 +1283,7 @@ def status(webapi, prefix, asset_type):
                 else:
                     symbol = ModificationStatus.NO_CHANGES  # no changes
 
-            if symbol:
+            if symbol != ModificationStatus.NO_CHANGES:
                 logger.info(
                     "[%s] %s/%s (@%s)",
                     symbol,
@@ -1407,7 +1407,11 @@ def push(
 
     if not force:  # filter again, if no local changes
         candidates = collections.OrderedDict(
-            [(k, v) for k, v in candidates.items() if v]
+            [
+                (asset_name, modification_status)
+                for asset_name, modification_status in candidates.items()
+                if modification_status != ModificationStatus.NO_CHANGES
+            ]
         )
 
     if not candidates: