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Backspace and Delete keys now function like Space in Solo.

[originally from svn r6237]

--- a/gtk.c

+++ b/gtk.c

@@ -550,6 +550,10 @@

         keyval = MOD_NUM_KEYPAD | '0';

     else if (event->keyval == GDK_KP_Begin || event->keyval == GDK_KP_5)

         keyval = MOD_NUM_KEYPAD | '5';

+    else if (event->keyval == GDK_BackSpace ||

+	     event->keyval == GDK_Delete ||

+	     event->keyval == GDK_KP_Delete)

+        keyval = '\177';

     else if (event->string[0] && !event->string[1])

         keyval = (unsigned char)event->string[0];

     else

--- a/solo.c

+++ b/solo.c

@@ -2364,13 +2364,13 @@

 	((button >= '1' && button <= '9' && button - '0' <= cr) ||

 	 (button >= 'a' && button <= 'z' && button - 'a' + 10 <= cr) ||

 	 (button >= 'A' && button <= 'Z' && button - 'A' + 10 <= cr) ||

-	 button == ' ')) {

+	 button == ' ' || button == '\010' || button == '\177')) {

 	int n = button - '0';

 	if (button >= 'A' && button <= 'Z')

 	    n = button - 'A' + 10;

 	if (button >= 'a' && button <= 'z')

 	    n = button - 'a' + 10;

-	if (button == ' ')

+	if (button == ' ' || button == '\010' || button == '\177')

 	    n = 0;

         /*