make deprecated method use non-deprecated method instead of the other

way around

src/main/org/apache/tools/ant/taskdefs/compilers/DefaultCompilerAdapter.java

@@ -697,8 +697,7 @@ public abstract class DefaultCompilerAdapter
      */
     @Deprecated
     protected boolean assumeJava19() {
-        return assumeJavaXY("javac1.9", JavaEnvUtils.JAVA_9)
-                || assumeJavaXY("javac9", JavaEnvUtils.JAVA_9);
+    	return assumeJava9();
     }
 
     /**
@@ -707,7 +706,8 @@ public abstract class DefaultCompilerAdapter
      * @since Ant 1.9.8
      */
     protected boolean assumeJava9() {
-        return assumeJava19();
+        return assumeJavaXY("javac1.9", JavaEnvUtils.JAVA_9)
+                || assumeJavaXY("javac9", JavaEnvUtils.JAVA_9);
     }
 
     /**