coverity#1327027 SIC: Inner class could be made static

Change-Id: I9c36aa362e58de724c63b9d23334eabfc973ee42

nlpsolver/src/com/sun/star/comp/Calc/NLPSolver/BaseNLPSolver.java

@@ -163,7 +163,7 @@ public abstract class BaseNLPSolver extends WeakBase
         return m_variables;
     }
 
-    private class RowInfo {
+    private static class RowInfo {
         private short Sheet;
         private int Row;
         private int StartCol;