Give DwarfPrinter a protected (but not virtual) destructor. Cppcheck

warns about this base class not having a virtual destructor, but since
this class has no virtual methods and neither it or the types derived
from it has a destructor, a protected trivial destructor will do (and
shuts cppcheck up) the trick without the cost of introducing a vtable.

llvm-svn: 95526

llvm/lib/CodeGen/AsmPrinter/DwarfPrinter.h

@@ -33,6 +33,8 @@ class Twine;
 
 class DwarfPrinter {
 protected:
+  ~DwarfPrinter() {}
+
   //===-------------------------------------------------------------==---===//
   // Core attributes used by the DWARF printer.
   //