tweaks: put some case labels closer to their statements

Also condense some comments, and group keys with the same result together.

src/winio.c

@@ -503,41 +503,42 @@ int parse_kbinput(WINDOW *win)
 		retval = ISSET(REBIND_DELETE) ? sc_seq_or(do_delete, 0) :
 			sc_seq_or(do_backspace, 0);
 		break;
-	    case KEY_DOWN:
 #ifdef KEY_SDOWN
 	    /* ncurses and Slang don't support KEY_SDOWN. */
 	    case KEY_SDOWN:
 #endif
+	    case KEY_DOWN:
 		retval = sc_seq_or(do_down_void, *kbinput);
 		break;
-	    case KEY_UP:
 #ifdef KEY_SUP
 	    /* ncurses and Slang don't support KEY_SUP. */
 	    case KEY_SUP:
 #endif
+	    case KEY_UP:
 		retval = sc_seq_or(do_up_void, *kbinput);
 		break;
-	    case KEY_LEFT:
 #ifdef KEY_SLEFT
 	    /* Slang doesn't support KEY_SLEFT. */
 	    case KEY_SLEFT:
 #endif
+	    case KEY_LEFT:
 		retval = sc_seq_or(do_left, *kbinput);
 		break;
-	    case KEY_RIGHT:
 #ifdef KEY_SRIGHT
 	    /* Slang doesn't support KEY_SRIGHT. */
 	    case KEY_SRIGHT:
 #endif
+	    case KEY_RIGHT:
 		retval = sc_seq_or(do_right, *kbinput);
 		break;
 #ifdef KEY_SHOME
 	    /* HP-UX 10-11 and Slang don't support KEY_SHOME. */
 	    case KEY_SHOME:
 #endif
+#ifdef KEY_HOME
 	    case KEY_HOME:
-	    case KEY_A1:	/* Home (7) on numeric keypad with
-				 * NumLock off. */
+#endif
+	    case KEY_A1:	/* Home (7) on keypad with NumLock off. */
 		retval = sc_seq_or(do_home, *kbinput);
 		break;
 	    case KEY_BACKSPACE:
@@ -559,62 +560,52 @@ int parse_kbinput(WINDOW *win)
 		break;
 #endif
 	    case KEY_NPAGE:
-	    case KEY_C3:	/* PageDown (4) on numeric keypad with
-				 * NumLock off. */
+	    case KEY_C3:	/* PageDown (4) on keypad with NumLock off. */
 		retval = sc_seq_or(do_page_down, *kbinput);
 		break;
 	    case KEY_PPAGE:
-	    case KEY_A3:	/* PageUp (9) on numeric keypad with
-				 * NumLock off. */
+	    case KEY_A3:	/* PageUp (9) on keypad with NumLock off. */
 		retval = sc_seq_or(do_page_up, *kbinput);
 		break;
 	    case KEY_ENTER:
 		retval = sc_seq_or(do_enter, *kbinput);
 		break;
-	    case KEY_B2:	/* Center (5) on numeric keypad with
-				 * NumLock off. */
-		retval = ERR;
-		break;
-	    case KEY_C1:	/* End (1) on numeric keypad with
-				 * NumLock off. */
 #ifdef KEY_SEND
 	    /* HP-UX 10-11 and Slang don't support KEY_SEND. */
 	    case KEY_SEND:
 #endif
+#ifdef KEY_END
 	    case KEY_END:
+#endif
+	    case KEY_C1:	/* End (1) on keypad with NumLock off. */
 		retval = sc_seq_or(do_end, *kbinput);
 		break;
+#ifdef KEY_SBEG
+	    /* Slang doesn't support KEY_SBEG. */
+	    case KEY_SBEG:
+#endif
 #ifdef KEY_BEG
 	    /* Slang doesn't support KEY_BEG. */
-	    case KEY_BEG:	/* Center (5) on numeric keypad with
-				 * NumLock off. */
+	    case KEY_BEG:
+#endif
+	    case KEY_B2:	/* Center (5) on keypad with NumLock off. */
 		retval = ERR;
 		break;
-#endif
 #ifdef KEY_CANCEL
-	    /* Slang doesn't support KEY_CANCEL. */
-	    case KEY_CANCEL:
 #ifdef KEY_SCANCEL
 	    /* Slang doesn't support KEY_SCANCEL. */
 	    case KEY_SCANCEL:
 #endif
+	    /* Slang doesn't support KEY_CANCEL. */
+	    case KEY_CANCEL:
 		retval = first_sc_for(currmenu, do_cancel)->seq;
 		break;
 #endif
-#ifdef KEY_SBEG
-	    /* Slang doesn't support KEY_SBEG. */
-	    case KEY_SBEG:	/* Center (5) on numeric keypad with
-				 * NumLock off. */
-		retval = ERR;
-		break;
-#endif
+#ifdef KEY_SUSPEND
 #ifdef KEY_SSUSPEND
 	    /* Slang doesn't support KEY_SSUSPEND. */
 	    case KEY_SSUSPEND:
-		retval = sc_seq_or(do_suspend_void, 0);
-		break;
 #endif
-#ifdef KEY_SUSPEND
 	    /* Slang doesn't support KEY_SUSPEND. */
 	    case KEY_SUSPEND:
 		retval = sc_seq_or(do_suspend_void, 0);