Forgot to bump actual version number

--HG--
extra : convert_revision : 2f31bc0e5d1c701ad8c03176bbb5722852c0c11d

options.h

@@ -240,7 +240,7 @@ be overridden at runtime with -K. 0 disables keepalives */
  *******************************************************************/
 #ifndef DROPBEAR_VERSION
-#define DROPBEAR_VERSION "0.50"
+#define DROPBEAR_VERSION "0.51"
 #endif
 #define LOCAL_IDENT "SSH-2.0-dropbear_" DROPBEAR_VERSION