GP-3278 fix DWARF enum signedness

Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/scalar/Scalar.java

@@ -93,6 +93,16 @@ public class Scalar {
 		return signed ? getSignedValue() : value;
 	}
 
+	/**
+	 * {@return the value, using the specified signedness.  Equivalent to calling getSignedValue()
+	 * or getUnsignedValue()}
+	 * 
+	 * @param signednessOverride true for a signed value, false for an unsigned value
+	 */
+	public long getValue(boolean signednessOverride) {
+		return signednessOverride ? getSignedValue() : value;
+	}
+
 	/**
 	 * Returns the BigInteger representation of the value.
 	 *