Try to fix code smell

Signed-off-by: Florian Dupuy <florian.dupuy@rte-france.com>

Author: flo-dup

network-area-diagram/src/main/java/com/powsybl/nad/svg/DefaultEdgeRendering.java

@@ -200,7 +200,7 @@ private List<Double> findAvailableAngles(List<Double> anglesOtherEdges, int nbAn
                 }
             }
 
-            if (nbAngles <= Arrays.stream(nbAvailableSlots).sum() && totalDeltaAvailable >= Math.toRadians(slotAperture)) {
+            if (nbAngles <= Arrays.stream(nbAvailableSlots).sum() && totalDeltaAvailable > 0) {
                 // Insert the angles in the "slots" separated by other edges which are large enough
                 int[] nbInsertedAngles = computeAnglesInsertedNumber(nbAngles, nbAvailableSlots, totalDeltaAvailable, deltaAngles);
                 return calculateInsertedAngles(nbInsertedAngles, deltaAngles, slotAperture, anglesOtherEdges);