single: fix types

diff --git a/Kernel/single.c b/Kernel/single.c
index f2fa633..ea47184 100644 (file)
--- a/Kernel/single.c
+++ b/Kernel/single.c
@@ -50,7 +50,7 @@ int pagemap_realloc(uint16_t size)
 
 uint16_t pagemap_mem_used(void)
 {
-       uint16_t mem = PROGTOP - ramtop + udata.u_top;
+       uint16_t mem = PROGTOP - ramtop + (uint16_t)udata.u_top;
        return mem >> 10;
 }