Bug 557706 - Allow LogControl printf method to be overridden (r=nnethercote,edwsmith)

Issues with prior patch not compiling with tamarin due to missing vtable,
so make sure printf isn't available unless verbose is enabled.

--HG--
extra : convert_revision : 147e02ce8790c9e09f4c91b29b1bcc5d16862ee1

js/src/nanojit/nanojit.h

@@ -260,7 +260,10 @@ namespace nanojit {
     public:
         // All Nanojit and jstracer printing should be routed through
         // this function.
+        virtual ~LogControl() {} 
+        #ifdef NJ_VERBOSE
         virtual void printf( const char* format, ... ) PRINTF_CHECK(2,3);
+        #endif
 
         // An OR of LC_Bits values, indicating what should be output
         uint32_t lcbits;