svm: make BoundMethodHandleUtils#make more readable

Author: zapster

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/methodhandles/Target_java_lang_invoke_BoundMethodHandle.java

@@ -152,8 +152,8 @@ final class BoundMethodHandleUtils {
     /* Bound method handle constructor */
     static Target_java_lang_invoke_BoundMethodHandle make(MethodType type, Target_java_lang_invoke_LambdaForm form, String species, Object... args) {
         Target_java_lang_invoke_SimpleMethodHandle bmh = new Target_java_lang_invoke_SimpleMethodHandle(type, form);
-        bmh.speciesData = SubstrateUtil.cast(SubstrateUtil.cast(Target_java_lang_invoke_BoundMethodHandle.SPECIALIZER, Target_java_lang_invoke_ClassSpecializer.class).findSpecies(species),
-                        Target_java_lang_invoke_BoundMethodHandle_SpeciesData.class);
+        var specializer = SubstrateUtil.cast(Target_java_lang_invoke_BoundMethodHandle.SPECIALIZER, Target_java_lang_invoke_ClassSpecializer.class);
+        bmh.speciesData = SubstrateUtil.cast(specializer.findSpecies(species), Target_java_lang_invoke_BoundMethodHandle_SpeciesData.class);
         bmh.args = (args != null) ? Arrays.copyOf(args, args.length) : new Object[0];
         return SubstrateUtil.cast(bmh, Target_java_lang_invoke_BoundMethodHandle.class);
     }