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.

jdinput.c

@@ -28,7 +28,7 @@ typedef struct {
   boolean inheaders;            /* TRUE until first SOS is reached */
 } my_input_controller;
 
-typedef my_input_controller * my_inputctl_ptr;
+typedef my_input_controller *my_inputctl_ptr;
 
 
 /* Forward declarations */
@@ -239,7 +239,7 @@ latch_quant_tables (j_decompress_ptr cinfo)
 {
   int ci, qtblno;
   jpeg_component_info *compptr;
-  JQUANT_TBL * qtbl;
+  JQUANT_TBL *qtbl;
 
   for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
     compptr = cinfo->cur_comp_info[ci];