check that zero entry actually looks like block end (fix linux32)

stdlib/Profile/src/Profile.jl

@@ -510,7 +510,10 @@ function fetch(;include_meta = false)
         i = length(data)
         while i > 0 && j > 0
             data_stripped[j] = data[i]
-            if data[i] == 0
+            if i > 1 && data[i] == 0 && in(data[i - 1], [1,2])
+                # detect block end and skip over metadata fields
+                # linux 32 has been seen to have rogue ips equal to 0 so also check for the previous entry looking like an idle
+                # state metadata entry which can only be 1 or 2
                 i -= nmeta
             end
             i -= 1