Speed up the comutation of the local members.

src/libs/cplusplus/FindUsages.cpp

@@ -540,6 +540,14 @@ Scope *FindUsages::enclosingScope()
             if (foreachStmt->symbol)
                 return foreachStmt->symbol->members();
 
+        } else if (SwitchStatementAST *switchStmt = ast->asSwitchStatement()) {
+            if (switchStmt->symbol)
+                return switchStmt->symbol->members();
+
+        } else if (CatchClauseAST *catchClause = ast->asCatchClause()) {
+            if (catchClause->symbol)
+                return catchClause->symbol->members();
+
         }
     }