Made uiFree(NULL) illegal to spot bugs.

TODO.md

@@ -1,4 +1,3 @@
-- forbid free(NULL) to check for bugs
 - opposite side alignment control in uiBox
 - disabling containers on wine doesn't redraw children as disabled
 	- test on real windows

darwin/alloc.m

@@ -49,6 +49,6 @@ void *uiRealloc(void *p, size_t new)
 void uiFree(void *p)
 {
 	if (p == NULL)
-		return;
+		complain("attempt to uiFree(NULL); there's a bug somewhere");
 	free(BASE(p));
 }

unix/alloc.c

@@ -39,5 +39,7 @@ void *uiRealloc(void *p, size_t new)
 
 void uiFree(void *p)
 {
+	if (p == NULL)
+		complain("attempt to uiFree(NULL); there's a bug somewhere");
 	g_free(BASE(p));
 }

windows/alloc.c

@@ -44,7 +44,7 @@ void *uiRealloc(void *p, size_t size)
 void uiFree(void *p)
 {
 	if (p == NULL)
-		return;
+		complain("attempt to uiFree(NULL); there's a bug somewhere");
 	if (HeapFree(heap, 0, p) == 0)
 		logLastError("error freeing memory in uiFree()");
 }