From Lorenzo:

Patch fixing compilation  of TMath dictionary in optimized mode


git-svn-id: http://root.cern.ch/svn/root/trunk@23624 27541ba8-7e3a-0410-8455-c3a389f83636

core/base/inc/LinkDef1.h

@@ -110,6 +110,7 @@
 
 #pragma link C++ nestedtypedef;
 #pragma link C++ namespace ROOT;
+#pragma link C++ namespace TMath; 
 #pragma link C++ typedef ShowMembersFunc_t;
 #pragma link C++ typedef ROOT::NewFunc_t;
 #pragma link C++ typedef ROOT::NewArrFunc_t;