fix length for string processing

In case string is null jstr_length crashes,
this fixes the issue and returns 0 because
null strings are replaced by empty strings
later in process.

Change-Id: Ib6b7a3985ae379207c4a06eb38df78dfdfbaffda
Signed-off-by: Michal Cmarada <mcmarada@cisco.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/java/jvpp-common/string_t.h b/java/jvpp-common/string_t.h
index 8a2b3cc..adfcde9 100644
--- a/java/jvpp-common/string_t.h
+++ b/java/jvpp-common/string_t.h
@@ -27,6 +27,7 @@
 // */
 static size_t jstr_length(JNIEnv *env, jstring string)
 {
+    if (string == NULL) return 0;
     return ((int) (*env)->GetStringUTFLength(env, string));
 }