lib/alloc.c: fix missing include

Include bitops.h to get BITS_PER_LONG and avoid errors such as

lib/alloc.c: In function mult_overflow:
lib/alloc.c:24:9: error: right shift count >= width of type
[-Werror=shift-count-overflow]
   24 |  if ((a >> 32) && (b >> 32))
      |         ^~

Fixes: cde8415e1 ("lib/alloc.c: add overflow check for calloc")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/alloc.c b/lib/alloc.c
index f4aa87a..6c89f98 100644
--- a/lib/alloc.c
+++ b/lib/alloc.c
@@ -1,5 +1,6 @@
 #include "alloc.h"
 #include "asm/page.h"
+#include "bitops.h"
 
 void *malloc(size_t size)
 {