Make sure the extra_data of GnuCompiler is initialized

diff --git a/source/gnucompiler.cpp b/source/gnucompiler.cpp
index beff9f9a5674e3735e9fe7abeb7bc98c9bcce930..4ee09ed5d97593c74c1130d509337ddec39b2ad0 100644 (file)
--- a/source/gnucompiler.cpp
+++ b/source/gnucompiler.cpp
@@ -104,6 +104,7 @@ string GnuCompiler::create_build_signature(const BuildInfo &binfo) const
 
 void GnuCompiler::do_prepare(ToolData &tool) const
 {
+       tool.extra_data = 0U;
        prepare_syspath(tool);
        prepare_version(tool);
 }