Fixed a possible random memory write

Interrupt · Interrupt · commit 21d5f58330ca · 2018-08-16T10:08:01.000-07:00
diff --git a/src/GameSrc/invent.c b/src/GameSrc/invent.c
@@ -1870,7 +1870,7 @@ ubyte add_to_some_page(ObjID obj, uchar select) {
         }
         if (pop != ADD_REJECT) {
             if (pop != ADD_NOEFFECT) {
-                if (dpy->pgnum != inventory_page) {
+                if (dpy->pgnum != inventory_page && dpy->pgnum < NUM_PAGE_BUTTONS) {
                     page_button_state[dpy->pgnum] = BttnFlashOn;
                 }
                 INVENT_CHANGED;

Original file line number	Diff line number	Diff line change
`@@ -1870,7 +1870,7 @@ ubyte add_to_some_page(ObjID obj, uchar select) {`
`1870`	`1870`	`}`
`1871`	`1871`	`if (pop != ADD_REJECT) {`
`1872`	`1872`	`if (pop != ADD_NOEFFECT) {`
`1873`		`- if (dpy->pgnum != inventory_page) {`
	`1873`	`+ if (dpy->pgnum != inventory_page && dpy->pgnum < NUM_PAGE_BUTTONS) {`
`1874`	`1874`	`page_button_state[dpy->pgnum] = BttnFlashOn;`
`1875`	`1875`	`}`
`1876`	`1876`	`INVENT_CHANGED;`