Fix for bootstrap crash when VPP compiled with gcc-7

See issue VPP-964

Change-Id: I2aed5abdc02e47e7bb5b0ce78cb6589a1ce7302f
Signed-off-by: Marco Varlese <marco.varlese@suse.com>
diff --git a/src/vnet/mfib/mfib_entry.c b/src/vnet/mfib/mfib_entry.c
index b37f882..804e10a 100644
--- a/src/vnet/mfib/mfib_entry.c
+++ b/src/vnet/mfib/mfib_entry.c
@@ -393,7 +393,7 @@
 {
     mfib_entry_t *mfib_entry;
 
-    pool_get(mfib_entry_pool, mfib_entry);
+    pool_get_aligned(mfib_entry_pool, mfib_entry, CLIB_CACHE_LINE_BYTES);
 
     fib_node_init(&mfib_entry->mfe_node,
                   FIB_NODE_TYPE_MFIB_ENTRY);