Fix app bug, where some memory could remain uninitialized due to early exit.

Change-Id: I4bdeff1c9f28c4e27f42559f89b925819b82cfc2

samples/RenderScript/Balls/src/com/example/android/rs/balls/ball_physics.rs

@@ -58,7 +58,7 @@ void root(const Ball_t *ballIn, Ball_t *ballOut, const BallControl_t *ctl, uint3
                     //ballOut->color.rgb = 1.f;
                     //ballOut->arcID = -1;
                     //ballOut->arcStr = 0;
-                    return;
+                    continue;
                 }
                 // Collision
                 float2 axis = normalize(vec);

samples/RenderScript/Balls/src/com/example/android/rs/balls/balls.rs

@@ -58,11 +58,11 @@ int root() {
     if (frame & 1) {
         bc.ain = rsGetAllocation(balls2);
         bc.aout = rsGetAllocation(balls1);
-        bout = balls2;
+        bout = balls1;
     } else {
         bc.ain = rsGetAllocation(balls1);
         bc.aout = rsGetAllocation(balls2);
-        bout = balls1;
+        bout = balls2;
     }
 
     bc.dimX = rsAllocationGetDimX(bc.ain);