Correct duplicate 'the' in help messages in zlib.h and xx_bitstream.h (fixes #1034)

Author: VarshaSree07

src/lib_ccx/cc_bitstream.h

@@ -20,7 +20,7 @@ struct bitstream
 	// This is meant to store high level syntax errors, i.e a function
 	// using the bitstream functions found a syntax error.
 	int error;
-	// Internal (private) variable - used to store the the bitstream
+	// Internal (private) variable - used to store the bitstream
 	// position until it is decided if the bitstream pointer will be
 	// increased by the calling function, or not.
 	unsigned char *_i_pos;

src/thirdparty/zlib/zlib.h

@@ -729,7 +729,7 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
    Then no more input data should be provided before the deflateParams() call.
    If this is done, the old level and strategy will be applied to the data
    compressed before deflateParams(), and the new level and strategy will be
-   applied to the the data compressed after deflateParams().
+   applied to the data compressed after deflateParams().
 
      deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream
    state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if