6914002: unsigned compare problem after 5057818

Reviewed-by: kvn, twisti

src/share/vm/code/nmethod.cpp

@@ -1170,7 +1170,7 @@ void nmethod::log_state_change() const {
 }
 
 // Common functionality for both make_not_entrant and make_zombie
-bool nmethod::make_not_entrant_or_zombie(int state) {
+bool nmethod::make_not_entrant_or_zombie(unsigned int state) {
   assert(state == zombie || state == not_entrant, "must be zombie or not_entrant");
 
   // If the method is already zombie there is nothing to do

src/share/vm/code/nmethod.hpp

@@ -255,7 +255,7 @@ class nmethod : public CodeBlob {
   const char* reloc_string_for(u_char* begin, u_char* end);
   // Returns true if this thread changed the state of the nmethod or
   // false if another thread performed the transition.
-  bool make_not_entrant_or_zombie(int state);
+  bool make_not_entrant_or_zombie(unsigned int state);
   void inc_decompile_count();
 
   // used to check that writes to nmFlags are done consistently.