removing shadowing redeclaration of result

Change-Id: Ic1f86962dfb8620cf5c63ff4913b2f0bf908abb5
diff --git a/libc/bionic/malloc_debug_common.c b/libc/bionic/malloc_debug_common.c
index ebf0006..b9fcbc4 100644
--- a/libc/bionic/malloc_debug_common.c
+++ b/libc/bionic/malloc_debug_common.c
@@ -84,7 +84,6 @@
         //
         // This is used for sorting, not determination of equality, so we don't
         // need to compare the bit flags.
-        int result;
         if (alloc1 > alloc2) {
             result = -1;
         } else if (alloc1 < alloc2) {