cmGeneratedFileStream: clang-tidy applied to remove redundant ``c_str`` calls

After changing the ``cmGeneratedFileStream`` methods to accept
``std::string const&`` instead of ``const char*`` we don't
need to call ``std::string::c_str`` anymore when passing
a ``std::string`` to a ``cmGeneratedFileStream`` method.

This patch removes all redundant ``std::string::c_str``
calls when passing a string to a ``cmGeneratedFileStream`` method.

It was generated by building CMake with clang-tidy enabled using
the following options:

-DCMAKE_CXX_CLANG_TIDY=/usr/bin/clang-tidy-4.0;-checks=-*,readability-redundant-string-cstr;-fix;-fix-errors

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmExtraKateGenerator.cxx b/Source/cmExtraKateGenerator.cxx
index df18715..f5c4c93 100644
--- a/Source/cmExtraKateGenerator.cxx
+++ b/Source/cmExtraKateGenerator.cxx
@@ -58,7 +58,7 @@ void cmExtraKateGenerator::CreateKateProjectFile(
 {
   std::string filename = lg->GetBinaryDirectory();
   filename += "/.kateproject";
-  cmGeneratedFileStream fout(filename.c_str());
+  cmGeneratedFileStream fout(filename);
   if (!fout) {
     return;
   }
@@ -215,7 +215,7 @@ void cmExtraKateGenerator::CreateDummyKateProjectFile(
   filename += "/";
   filename += this->ProjectName;
   filename += ".kateproject";
-  cmGeneratedFileStream fout(filename.c_str());
+  cmGeneratedFileStream fout(filename);
   if (!fout) {
     return;
   }