removed physics error from TerrainGrid tests

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9977 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/test/jme3test/terrain/TerrainGridAlphaMapTest.java

@@ -202,9 +202,11 @@ public class TerrainGridAlphaMapTest extends SimpleApplication {
 
             public void tileDetached(Vector3f cell, TerrainQuad quad) {
                 if (usePhysics) {
+                    if (quad.getControl(RigidBodyControl.class) != null) {
                         bulletAppState.getPhysicsSpace().remove(quad);
                         quad.removeControl(RigidBodyControl.class);
                     }
+                }
                 updateMarkerElevations();
             }
         });

engine/src/test/jme3test/terrain/TerrainGridSerializationTest.java

@@ -88,9 +88,11 @@ public class TerrainGridSerializationTest extends SimpleApplication {
                 }
 
                 public void tileDetached(Vector3f cell, TerrainQuad quad) {
+                    if (quad.getControl(RigidBodyControl.class) != null) {
                         bulletAppState.getPhysicsSpace().remove(quad);
                         quad.removeControl(RigidBodyControl.class);
                     }
+                }
 
             });
         }

engine/src/test/jme3test/terrain/TerrainGridTest.java

@@ -149,9 +149,11 @@ public class TerrainGridTest extends SimpleApplication {
                 }
 
                 public void tileDetached(Vector3f cell, TerrainQuad quad) {
+                    if (quad.getControl(RigidBodyControl.class) != null) {
                         bulletAppState.getPhysicsSpace().remove(quad);
                         quad.removeControl(RigidBodyControl.class);
                     }
+                }
 
             });
         }

engine/src/test/jme3test/terrain/TerrainGridTileLoaderTest.java

@@ -145,9 +145,11 @@ public class TerrainGridTileLoaderTest extends SimpleApplication {
                 }
 
                 public void tileDetached(Vector3f cell, TerrainQuad quad) {
+                    if (quad.getControl(RigidBodyControl.class) != null) {
                         bulletAppState.getPhysicsSpace().remove(quad);
                         quad.removeControl(RigidBodyControl.class);
                     }
+                }
 
             });
         }