Fix/validate start web transaction (#6)

* Validate start (web and non web) transaction

Signed-off-by: Daniela Bento <[email protected]>

lib/lua-nri/newrelic.lua

@@ -1122,7 +1122,12 @@ end
 
 -- web transactions
 local newrelic_start_web_transaction = function(application, name)
-  return nr.newrelic_start_web_transaction(application, name)
+  local p = ffi.new('newrelic_txn_t*[1]')
+  p[0] = nr.newrelic_start_web_transaction(application, name)
+  if p[0] == nil then
+    return nil
+  end
+  return p[0]
 end
 
 local newrelic_end_web_transaction = function(transaction_id, nonWeb)
@@ -1154,7 +1159,12 @@ end
 
 -- non web transactions
 local newrelic_start_non_web_transaction = function(application, name)
-  return nr.newrelic_start_non_web_transaction(application, name)
+  local p = ffi.new('newrelic_txn_t*[1]')
+  p[0] = nr.newrelic_start_non_web_transaction(application, name)
+  if p[0] == nil then
+    return nil
+  end
+  return p[0]
 end
 
 local newrelic_end_non_web_transaction = function(transaction_id)

lua-newrelic-integration-0.01-6.rockspec → lua-newrelic-integration-0.01-7.rockspec

@@ -1,8 +1,8 @@
 package = "lua-newrelic-integration"
-version = "0.01-6"
+version = "0.01-7"
 source = {
    url = "git://github.com/danifbento/lua-newrelic-integration",
-   tag = "v0.01-6"
+   tag = "v0.01-7"
 }
 description = {
    summary = "Lua newrelic client library for OpenResty / ngx_lua.",