Turn on -Wall for compilers, and fix warnings that result. Got 'em

all for win32 build, but some remain for wince that I'm unable to fix.

xwords4/wince/ceclrsel.c

@@ -258,7 +258,6 @@ typedef struct ColorsDlgState {
 static void
 initColorData( ColorsDlgState* cState, HWND hDlg )
 {
-    CEAppGlobals* globals = cState->globals;
     XP_U16 i;
 
     XP_ASSERT( (LAST_BUTTON - FIRST_BUTTON + 1) == NUM_EDITABLE_COLORS );

xwords4/wince/cehntlim.c

@@ -19,6 +19,7 @@
 
 #ifdef XWFEATURE_SEARCHLIMIT
 
+#include <stdio.h>
 #include "cehntlim.h"
 
 static void

xwords4/wince/ceprefs.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
+#include <stdio.h>
+
 #include "ceprefs.h"
 #include "cemain.h"
 #include "ceclrsel.h"