[clang-format][NFC] Early return when nothing to do

Do not compute SkipFirstExtraIndent just to see that there are no fake l
parens.

Differential Revision: https://reviews.llvm.org/D115070

GitOrigin-RevId: 4041f16bb489d6cbdebfed33a2c5cc586cb3839b
diff --git a/lib/Format/ContinuationIndenter.cpp b/lib/Format/ContinuationIndenter.cpp
index cbb8d50..04d05e1 100644
--- a/lib/Format/ContinuationIndenter.cpp
+++ b/lib/Format/ContinuationIndenter.cpp
@@ -1337,6 +1337,9 @@
 void ContinuationIndenter::moveStatePastFakeLParens(LineState &State,
                                                     bool Newline) {
   const FormatToken &Current = *State.NextToken;
+  if (Current.FakeLParens.empty())
+    return;
+
   const FormatToken *Previous = Current.getPreviousNonComment();
 
   // Don't add extra indentation for the first fake parenthesis after