Fix kernel_size and initrd_size sign (Francois Revol)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6415 c046a42c-6fe2-441c-8c8c-71466251a162

hw/ppc_oldworld.c

diff --git a/hw/ppc_oldworld.c b/hw/ppc_oldworld.c
index f60b174..042a40f 100644
--- a/hw/ppc_oldworld.c
+++ b/hw/ppc_oldworld.c
@@ -121,7 +121,8 @@
     m48t59_t *m48t59;
     int linux_boot, i;
     ram_addr_t ram_offset, vga_ram_offset, bios_offset, vga_bios_offset;
-    uint32_t kernel_base, kernel_size, initrd_base, initrd_size;
+    uint32_t kernel_base, initrd_base;
+    int32_t kernel_size, initrd_size;
     PCIBus *pci_bus;
     MacIONVRAMState *nvr;
     int vga_bios_size, bios_size;