Fix compile warnings and errors

Change-Id: I30a9299390cef302a8d3e61b6aa6e38731be1529
Signed-off-by: Bruce Beare <brucex.j.beare@intel.com>
diff --git a/Tremolo/bitwise.c b/Tremolo/bitwise.c
index 3f1be7a..2182641 100644
--- a/Tremolo/bitwise.c
+++ b/Tremolo/bitwise.c
@@ -214,7 +214,7 @@
 /* Read in bits without advancing the bitptr; bits <= 32 */
 long oggpack_look(oggpack_buffer *b,int bits){
   unsigned long m=mask[bits];
-  unsigned long ret;
+  unsigned long ret = 0;
   int BITS = bits;
 
   bits+=b->headbit;