switched string::compare to strncmp

Source/cmDSPWriter.cxx

@@ -128,7 +128,7 @@ void cmDSPWriter::OutputDSPFile()
     // so don't build a projectfile for it
     if ((l->second.GetType() != cmTarget::INSTALL_FILES)
         && (l->second.GetType() != cmTarget::INSTALL_PROGRAMS)
-        && (l->first.compare(0,26, "INCLUDE_EXTERNAL_MSPROJECT") != 0))
+        && (strncmp(l->first.c_str(), "INCLUDE_EXTERNAL_MSPROJECT", 26) != 0))
       {
       this->CreateSingleDSP(l->first.c_str(),l->second);
       }

Source/cmDSWWriter.cxx

@@ -172,7 +172,7 @@ void cmDSWWriter::WriteDSWFile(std::ostream& fout)
           }
         }
       // Write the project into the DSW file
-      if (l->first.compare(0,26, "INCLUDE_EXTERNAL_MSPROJECT") == 0)
+      if (strncmp(l->first.c_str(), "INCLUDE_EXTERNAL_MSPROJECT", 26) == 0)
       {
         cmCustomCommand cc = l->second.GetCustomCommands()[0];