Use consistent/modern code formatting for pointers

The convention used by libjpeg:

    type * variable;

is not very common anymore, because it looks too much like
multiplication.  Some (particularly C++ programmers) prefer to tuck the
pointer symbol against the type:

    type* variable;

to emphasize that a pointer to a type is effectively a new type.
However, this can also be confusing, since defining multiple variables
on the same line would not work properly:

    type* variable1, variable2;  /* Only variable1 is actually a
                                    pointer. */

This commit reformats the entirety of the libjpeg-turbo code base so
that it uses the same code formatting convention for pointers that the
TurboJPEG API code uses:

    type *variable1, *variable2;

This seems to be the most common convention among C programmers, and
it is the convention used by other codec libraries, such as libpng and
libtiff.
diff --git a/jdhuff.h b/jdhuff.h
index 1bf0390..87d4465 100644
--- a/jdhuff.h
+++ b/jdhuff.h
@@ -101,7 +101,7 @@
 typedef struct {                /* Bitreading working state within an MCU */
   /* Current data source location */
   /* We need a copy, rather than munging the original, in case of suspension */
-  const JOCTET * next_input_byte; /* => next byte to read from source */
+  const JOCTET *next_input_byte; /* => next byte to read from source */
   size_t bytes_in_buffer;       /* # of bytes remaining in source buffer */
   /* Bit input buffer --- note these values are kept in register variables,
    * not in this struct, inside the inner loops.
@@ -166,7 +166,7 @@
 
 /* Load up the bit buffer to a depth of at least nbits */
 EXTERN(boolean) jpeg_fill_bit_buffer
-        (bitread_working_state * state, register bit_buf_type get_buffer,
+        (bitread_working_state *state, register bit_buf_type get_buffer,
          register int bits_left, int nbits);
 
 
@@ -230,5 +230,5 @@
 
 /* Out-of-line case for Huffman code fetching */
 EXTERN(int) jpeg_huff_decode
-        (bitread_working_state * state, register bit_buf_type get_buffer,
-         register int bits_left, d_derived_tbl * htbl, int min_bits);
+        (bitread_working_state *state, register bit_buf_type get_buffer,
+         register int bits_left, d_derived_tbl *htbl, int min_bits);