[PATCH] coverity: i386: build.c: negative return to unsigned fix

Variable "c" was declared as an unsigned int, but used in:

125 for (i=0 ; (c=read(fd, buf, sizeof(buf)))>0 ; i+=c )
126 if (write(1, buf, c) != c)
127 die("Write call failed");

(akpm: read() can return -1. If it does, we fill the disk up with garbage).

Signed-off-by: Zaur Kambarov <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/i386/boot/tools/build.c

···
 
 int main(int argc, char ** argv)
 {
-	unsigned int i, c, sz, setup_sectors;
+	unsigned int i, sz, setup_sectors;
+	int c;
 	u32 sys_size;
 	byte major_root, minor_root;
 	struct stat sb;