Cleaned up location of init and free for some programs to prevent memory
leaks on incorrect arguments
diff --git a/programs/pkey/dh_genprime.c b/programs/pkey/dh_genprime.c
index b111991..e349140 100644
--- a/programs/pkey/dh_genprime.c
+++ b/programs/pkey/dh_genprime.c
@@ -69,6 +69,7 @@
     ((void) argv);
 
     mpi_init( &G ); mpi_init( &P ); mpi_init( &Q );
+    entropy_init( &entropy );
 
     if( ( ret = mpi_read_string( &G, 10, GENERATOR ) ) != 0 )
     {
@@ -86,7 +87,6 @@
     printf( "\n  . Seeding the random number generator..." );
     fflush( stdout );
 
-    entropy_init( &entropy );
     if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
                                (const unsigned char *) pers,
                                strlen( pers ) ) ) != 0 )