multiboot1: never place modules in low memory.

While in theory permitted by the spec, modules rarely fit in low memory
anyway and not every kernel is able to handle modules in low memory anyway.
At least VMWare is known not to be able to handle modules at arbitrary
locations.

grub-core/loader/multiboot.c

@@ -333,6 +333,7 @@ grub_cmd_module (grub_command_t cmd __attribute__ ((unused)),
     return grub_errno;
 
 #ifndef GRUB_USE_MULTIBOOT2
+  lowest_addr = 0x100000;
   if (grub_multiboot_quirks & GRUB_MULTIBOOT_QUIRK_MODULES_AFTER_KERNEL)
     lowest_addr = ALIGN_UP (highest_load + 1048576, 4096);
 #endif