Fix for if no data to send

FalconChristmas · Sep 4, 2019 · cd1e5d8 · cd1e5d8
1 parent 64f7583
commit cd1e5d8
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/VASTFMT.cpp b/src/VASTFMT.cpp
@@ -158,7 +158,9 @@ bool VASTFMT::sendSi4711Command(uint8_t cmd, const std::vector<uint8_t> &dataIn,
     aucBufOut[2] = RequestSi4711Access;
     aucBufOut[3] = dataIn.size() + 1;
     aucBufOut[4] = cmd;
-    memcpy(&aucBufOut[5], &dataIn[0], dataIn.size());
+    if (dataIn.size() > 0) {
+        memcpy(&aucBufOut[5], &dataIn[0], dataIn.size());
+    }
 
     hid_write(phd, aucBufOut, 43);
     int r = hid_read(phd, aucBufIn, 42);