Reduces the need to maintain the bodies of two DataSource constructors in the...

Reduces the need to maintain the bodies of two DataSource constructors in the extenders of AbstractPushBufferCaptureDevice by taking into account the differences in the value of the MediaLocator locator argument.

src/org/jitsi/impl/neomedia/jmfext/media/protocol/AbstractPushBufferCaptureDevice.java

@@ -131,6 +131,7 @@ protected Format setFormat(
      */
     protected AbstractPushBufferCaptureDevice()
     {
+        this(null);
     }
 
     /**
@@ -141,7 +142,8 @@ protected AbstractPushBufferCaptureDevice()
      */
     protected AbstractPushBufferCaptureDevice(MediaLocator locator)
     {
-        setLocator(locator);
+        if (locator != null)
+            setLocator(locator);
     }
 
     /**

src/org/jitsi/impl/neomedia/jmfext/media/protocol/AbstractVideoPushBufferCaptureDevice.java

@@ -25,6 +25,7 @@ public abstract class AbstractVideoPushBufferCaptureDevice
      */
     protected AbstractVideoPushBufferCaptureDevice()
     {
+        this(null);
     }
 
     /**

src/org/jitsi/impl/neomedia/jmfext/media/protocol/directshow/DataSource.java

@@ -110,6 +110,7 @@ public static int getFFmpegPixFmt(int dsPixFmt)
      */
     public DataSource()
     {
+        this(null);
     }
 
     /**

src/org/jitsi/impl/neomedia/jmfext/media/protocol/quicktime/DataSource.java

@@ -62,6 +62,7 @@ public class DataSource
      */
     public DataSource()
     {
+        this(null);
     }
 
     /**

src/org/jitsi/impl/neomedia/jmfext/media/protocol/wasapi/DataSource.java

@@ -35,6 +35,7 @@ public class DataSource
      */
     public DataSource()
     {
+        this(null);
     }
 
     /**