javaunohelper: The assigned value is sometimes used

Change-Id: I292921ef5b98ffbae9a0d5b631498a2d6efefbfd
Reviewed-on: https://gerrit.libreoffice.org/10941Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>

javaunohelper/com/sun/star/lib/uno/helper/UnoUrl.java

@@ -295,12 +295,15 @@ public class UnoUrl {
 
     private static UnoUrlPart parseUnoUrlPart(String thePart)
         throws com.sun.star.lang.IllegalArgumentException {
-        String partName = thePart;
-        String theParamPart = "";
+        String partName;
+        String theParamPart;
         int index = thePart.indexOf(",");
         if (index != -1) {
             partName = thePart.substring(0, index).trim();
             theParamPart = thePart.substring(index + 1).trim();
+        } else {
+            partName = thePart;
+            theParamPart = "";
         }
 
         if (!isAlphaNumeric(partName)) {