x86: fix uninitialized variable in init_memory_mapping()

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
LKML-Reference: <1236265466.31324.9.camel@penberg-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 6d63e3d..15219e0 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -134,8 +134,8 @@
 {
 	unsigned long page_size_mask = 0;
 	unsigned long start_pfn, end_pfn;
+	unsigned long ret = 0;
 	unsigned long pos;
-	unsigned long ret;
 
 	struct map_range mr[NR_RANGE_MR];
 	int nr_range, i;