memdisk: Fix "might be used uninitialized" warning

Impact: Initializing variables

The checksum_buf function was providing an incorrect checksum
on at least one build.

diff --git a/memdisk/setup.c b/memdisk/setup.c
index ea17afd..b8eadfb 100644 (file)
--- a/memdisk/setup.c
+++ b/memdisk/setup.c
@@ -592,7 +592,7 @@ static const struct geometry *get_disk_image_geometry(uint32_t where,
                while (!ok) {
                    /* Assume it's a floppy drive, guess a geometry */
                    unsigned int type, track;
-                   int c, h, s;
+                   int c, h, s = 0;
 
                    if (xsectors < 320 * 2) {
                        c = 40;
@@ -795,7 +795,7 @@ static void relocate_rm_code(uint32_t newbase)
 static uint8_t checksum_buf(const void *buf, int count)
 {
     const uint8_t *p = buf;
-    uint8_t c;
+    uint8_t c = 0;
 
     while (count--)
        c += *p++;