#1590 Resolves issue with RSP tuners generating too many native buffers causing excessive memory consumption (#1591)

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/source/tuner/sdrplay/RspNativeBufferFactory.java

@@ -122,7 +122,7 @@ public class RspNativeBufferFactory
         {
             int optimal = 128;
 
-            while((optimal * 2) < length)
+            while((optimal) < length)
             {
                 optimal *= 2;
             }