genex: remove the need for backtraces

Rather than making dummy backtraces and passing them around, just make
backtraces optional.

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmInstalledFile.cxx b/Source/cmInstalledFile.cxx
index 6860e00fcd..7813fcc5cd 100644
--- a/Source/cmInstalledFile.cxx
+++ b/Source/cmInstalledFile.cxx
@@ -33,7 +33,7 @@ cmInstalledFile::~cmInstalledFile()
 void cmInstalledFile::SetName(cmMakefile* mf, const std::string& name)
 {
   cmListFileBacktrace backtrace = mf->GetBacktrace();
-  cmGeneratorExpression ge(backtrace);
+  cmGeneratorExpression ge(&backtrace);
 
   this->Name = name;
   this->NameExpression = ge.Parse(name).release();
@@ -70,7 +70,7 @@ void cmInstalledFile::AppendProperty(cmMakefile const* mf,
   const std::string& prop, const char* value, bool /*asString*/)
 {
   cmListFileBacktrace backtrace = mf->GetBacktrace();
-  cmGeneratorExpression ge(backtrace);
+  cmGeneratorExpression ge(&backtrace);
 
   Property& property = this->Properties[prop];
   property.ValueExpressions.push_back(ge.Parse(value).release());