also check other direction

git-svn-id: svn+ssh://svn.cprover.org/srv/svn/cbmc/trunk@3514 6afb6bc1-c8e4-404c-8f48-9ae832c5b171

regression/cbmc/Pointer_byte_extract6/main.c

@@ -17,4 +17,8 @@ int main()
   assert(((struct some *)&signed_int)->f==1);
   assert(*(int *)&a_float==1065353216);
   assert(*(long int *)&a_double==4607182418800017408l);
+  
+  // other direction
+  signed_int=1065353216;
+  assert(*(float *)&signed_int==1.0f);
 }