Fix wrong bool check.

sqstdlib/sqstdaux.cpp

@@ -82,9 +82,10 @@ void sqstd_printcallstack(HSQUIRRELVM v)
 				case OT_WEAKREF:
 					pf(v,_SC("[%s] WEAKREF\n"),name);
 					break;
-				case OT_BOOL:{
-					sq_getinteger(v,-1,&i);
-					pf(v,_SC("[%s] %s\n"),name,i?_SC("true"):_SC("false"));
+				case OT_BOOL:{
+				    SQBool bval;
+					sq_getbool(v,-1,&bval);
+					pf(v,_SC("[%s] %s\n"),name, bval == SQTrue ? _SC("true") : _SC("false"));
 							 }
 					break;
 				default: assert(0); break;