Related tdf#135211: return early if no data

With DEPS or SCO Evolutionary algorithms, it'll return
"No solution found."
Change-Id: I15e8e24eb519a20e3f3645b79e990949f648fbd2

Change-Id: I7321419ccc1cd00d75f03fa86d3c0cb4bf9ad473
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99584
Tested-by: Julien Nabet <serval2412@yahoo.fr>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

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

@@ -189,6 +189,10 @@ public abstract class BaseEvolutionarySolver extends BaseNLPSolver {
     protected void initializeSolve() {
         super.initializeSolve();
 
+        if (m_variableCount == 0)
+        {
+            return;
+        }
         if (m_enhancedSolverStatus.getValue())
             m_solverStatusDialog = new EvolutionarySolverStatusUno(m_xContext);
         else

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

@@ -119,6 +119,10 @@ public final class DEPSSolverImpl extends BaseEvolutionarySolver
             Logger.getLogger(DEPSSolverImpl.class.getName()).log(Level.SEVERE, null, ex);
         }
         initializeSolve();
+        if (m_problemEncoder == null)
+        {
+            return;
+        }
 
         //Init:
         DEPSAgent[] agents = new DEPSAgent[m_swarmSize.getValue()];

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

@@ -90,6 +90,11 @@ public final class SCOSolverImpl extends BaseEvolutionarySolver
     public void solve() {
         initializeSolve();
 
+        if (m_problemEncoder == null)
+        {
+            return;
+        }
+
         //Init:
         int swarmSize = m_swarmSize.getValue();
         SCAgent[] agents = new SCAgent[swarmSize];