throwing exception on error

src/gen_cpp_Engine.ysl2

@@ -12,6 +12,7 @@ tstylesheet {
         #include <assert.h>
         #include <pEp/message_api.h>
         #include "org_pEp_jniadapter_«@name».h"
+        #include "throw_pEp_exception.hh"
         #include "jniutils.hh"
 
         using namespace pEp::JNIAdapter;
@@ -41,6 +42,11 @@ tstylesheet {
             `` apply "parm[creates|returns]", mode=out
 
             PEP_STATUS status = ::«@name»(session`apply "parm", mode=call``if "@name = 'encrypt_message'" > , PEP_enc_PEP`);
+            if ((status > PEP_STATUS_OK && status < PEP_UNENCRYPTED) |`> |`
+                    status >= PEP_TRUSTWORD_NOT_FOUND) {
+                throw_pEp_Exception(env, status);
+                return NULL;
+            }
 
         ||