Use glib memory allocation and free functions

qemu_malloc/qemu_free no longer exist after this commit.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/qxl-render.c b/hw/qxl-render.c
index 1b77577..c290739 100644
--- a/hw/qxl-render.c
+++ b/hw/qxl-render.c
@@ -81,7 +81,7 @@
         qxl->guest_primary.resized = 0;
 
         if (qxl->guest_primary.flipped) {
-            qemu_free(qxl->guest_primary.flipped);
+            g_free(qxl->guest_primary.flipped);
             qxl->guest_primary.flipped = NULL;
         }
         qemu_free_displaysurface(vga->ds);
@@ -90,7 +90,7 @@
         if (qxl->guest_primary.stride < 0) {
             /* spice surface is upside down -> need extra buffer to flip */
             qxl->guest_primary.stride = -qxl->guest_primary.stride;
-            qxl->guest_primary.flipped = qemu_malloc(qxl->guest_primary.surface.width *
+            qxl->guest_primary.flipped = g_malloc(qxl->guest_primary.surface.width *
                                                      qxl->guest_primary.stride);
             ptr = qxl->guest_primary.flipped;
         } else {