Checks if exclude file is empty before creating the regular expressions.

The default file created by the application it is not empty.

Signed-off-by: Camila San <hello@camila.codes>

src/csync/csync_exclude.cpp

@@ -322,7 +322,11 @@ bool ExcludedFiles::loadExcludeFile(const QByteArray & basePath, const QString &
         csync_exclude_expand_escapes(line);
         _allExcludes[basePath].append(line);
     }
-    prepare(basePath);
+
+    // nothing to prepare if the user decided to not exclude anything
+    if(_allExcludes.size())
+        prepare(basePath);
+
     return true;
 }