Use correct format string identifier

irdb-libs/libIRDB-core/src/assemblestr.hpp

@@ -11,7 +11,7 @@ static void assemblestr(ks_engine * &ks, IRDB_SDK::Instruction_t *ins, const cha
                 ks_close(ks);
                 char msg[250];
                 snprintf(msg, sizeof msg,
-                         "ERROR: ks_asm() failed during instruction assembly. (instruction=%s, count=%lu, error=%s)",
+                         "ERROR: ks_asm() failed during instruction assembly. (instruction=%s, count=%zu, error=%s)",
                          instruct, count, ks_strerror(error));
                 throw std::runtime_error(msg);
     }