sonar fix

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1747093 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFColor.java

@@ -168,6 +168,7 @@ public class XSLFColor {
                 }
             } else if (ch instanceof CTFontReference) {
                 // try next ...
+                continue;
             } else {
                 throw new IllegalArgumentException("Unexpected color choice: " + ch.getClass());
             }