From 687aef913c471bcbd105f49bec8bcdf976ce7eb5 Mon Sep 17 00:00:00 2001
From: Sebastian Holtermann <sebholt@xwmw.org>
Date: Sat, 26 Aug 2017 14:06:09 +0200
Subject: cmSourceFile: Avoid unnecessary vector copy

---
 Source/cmSourceFile.cxx | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Source/cmSourceFile.cxx b/Source/cmSourceFile.cxx
index 912f773..6d2b98d 100644
--- a/Source/cmSourceFile.cxx
+++ b/Source/cmSourceFile.cxx
@@ -136,10 +136,10 @@ bool cmSourceFile::FindFullPath(std::string* error)
   } else {
     tryDirs[0] = "";
   }
-  const std::vector<std::string>& srcExts =
-    mf->GetCMakeInstance()->GetSourceExtensions();
-  std::vector<std::string> hdrExts =
-    mf->GetCMakeInstance()->GetHeaderExtensions();
+
+  cmake const* const cmakeInst = mf->GetCMakeInstance();
+  std::vector<std::string> const& srcExts = cmakeInst->GetSourceExtensions();
+  std::vector<std::string> const& hdrExts = cmakeInst->GetHeaderExtensions();
   for (const char* const* di = tryDirs; *di; ++di) {
     std::string tryPath = this->Location.GetDirectory();
     if (!tryPath.empty()) {
-- 
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