Fix spelling in comments

multifuction -> multifunction
successfull -> successful.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>

hw/pci.c

@@ -604,7 +604,7 @@ static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev)
     }
 
     /*
-     * multifuction bit is interpreted in two ways as follows.
+     * multifunction bit is interpreted in two ways as follows.
      *   - all functions must set the bit to 1.
      *     Example: Intel X53
      *   - function 0 must set the bit, but the rest function (> 0)

posix-aio-compat.c

@@ -128,7 +128,7 @@ static ssize_t handle_aiocb_ioctl(struct qemu_paiocb *aiocb)
 
     /*
      * This looks weird, but the aio code only consideres a request
-     * successfull if it has written the number full number of bytes.
+     * successful if it has written the number full number of bytes.
      *
      * Now we overload aio_nbytes as aio_ioctl_cmd for the ioctl command,
      * so in fact we return the ioctl command here to make posix_aio_read()

ui/vnc-enc-tight.c

@@ -641,7 +641,7 @@ DEFINE_GRADIENT_FILTER_FUNCTION(32)
 /*
  * Check if a rectangle is all of the same color. If needSameColor is
  * set to non-zero, then also check that its color equals to the
- * *colorPtr value. The result is 1 if the test is successfull, and in
+ * *colorPtr value. The result is 1 if the test is successful, and in
  * that case new color will be stored in *colorPtr.
  */