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.

jidctfst.c

@@ -168,7 +168,7 @@
  */
 
 GLOBAL(void)
-jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info *compptr,
                  JCOEFPTR coef_block,
                  JSAMPARRAY output_buf, JDIMENSION output_col)
 {
@@ -176,8 +176,8 @@ jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
   DCTELEM tmp10, tmp11, tmp12, tmp13;
   DCTELEM z5, z10, z11, z12, z13;
   JCOEFPTR inptr;
-  IFAST_MULT_TYPE * quantptr;
-  int * wsptr;
+  IFAST_MULT_TYPE *quantptr;
+  int *wsptr;
   JSAMPROW outptr;
   JSAMPLE *range_limit = IDCT_range_limit(cinfo);
   int ctr;