Reject hex letters in NumericEntityUnescaper decimal scan (#1739).

Author: garydgregory

src/changes/changes.xml

@@ -218,6 +218,7 @@ java.lang.NullPointerException: Cannot invoke
     <action                   type="fix" dev="ggregory" due-to="alhudz, Gary Gregory">Fix Strings.CI.indexOf() returning out-of-range index for empty search (#1737).</action>
     <action issue="LANG-1827" type="fix" dev="ggregory" due-to="Sarankumar Baskar, Gary Gregory">Support escaped single quotes ('') in DurationFormatUtils format patterns (#1700).</action>
     <action                   type="fix" dev="ggregory" due-to="alhudz, Gary Gregory">Keep DurationFormatUtils.lexx() from merging repeated fields split by a literal (#1738).</action>
+    <action                   type="fix" dev="ggregory" due-to="alhudz, Gary Gregory">Reject hex letters in NumericEntityUnescaper decimal scan (#1739).</action>
     <!-- ADD -->
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add JavaVersion.JAVA_27.</action>
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add SystemUtils.IS_JAVA_27.</action>