Fix spelling (prefered -> preferred)

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

configure

@@ -2130,7 +2130,7 @@ if test "$pixman" = "system"; then
 else
   if test ! -d ${source_path}/pixman/pixman; then
     echo "ERROR: pixman not present. Your options:"
-    echo "  (1) Prefered: Install the pixman devel package (any recent"
+    echo "  (1) Preferred: Install the pixman devel package (any recent"
     echo "      distro should have packages as Xorg needs pixman too)."
     echo "  (2) Fetch the pixman submodule, using:"
     echo "      git submodule update --init pixman"

net/tap-win32.c

@@ -565,7 +565,7 @@ static void tap_win32_free_buffer(tap_win32_overlapped_t *overlapped,
 }
 
 static int tap_win32_open(tap_win32_overlapped_t **phandle,
-                          const char *prefered_name)
+                          const char *preferred_name)
 {
     char device_path[256];
     char device_guid[0x100];
@@ -581,8 +581,9 @@ static int tap_win32_open(tap_win32_overlapped_t **phandle,
     DWORD version_len;
     DWORD idThread;
 
-    if (prefered_name != NULL)
-        snprintf(name_buffer, sizeof(name_buffer), "%s", prefered_name);
+    if (preferred_name != NULL) {
+        snprintf(name_buffer, sizeof(name_buffer), "%s", preferred_name);
+    }
 
     rc = get_device_guid(device_guid, sizeof(device_guid), name_buffer, sizeof(name_buffer));
     if (rc)