adding cmath include to avoid compilation error due to undefined function ceil on...

diff --git a/HLT/BASE/AliHLTIndexGrid.h b/HLT/BASE/AliHLTIndexGrid.h
index e71fd002270ef478fe29d4a276d61c66249c62c8..0fdda2067249c66d4e19a33b5f37d3a0ae62c6de 100644 (file)
--- a/HLT/BASE/AliHLTIndexGrid.h
+++ b/HLT/BASE/AliHLTIndexGrid.h
@@ -17,6 +17,7 @@
 #include <iomanip>
 #include <memory>
 #include <cerrno>
+#include <cmath>
 
 template <typename T, typename V>
 class AliHLTIndexGrid {