minor fixups to get nrf52 building again

src/mesh/FloodingRouter.cpp

@@ -116,7 +116,7 @@ bool FloodingRouter::wasSeenRecently(const MeshPacket *p)
     }
 
     uint32_t now = millis();
-    for (int i = 0; i < recentBroadcasts.size();) {
+    for (size_t i = 0; i < recentBroadcasts.size();) {
         BroadcastRecord &r = recentBroadcasts[i];
 
         if ((now - r.rxTimeMsec) >= FLOOD_EXPIRE_TIME) {

src/mesh/RadioLibInterface.cpp

@@ -197,6 +197,9 @@ void RadioLibInterface::loop()
 
 #ifndef NO_ESP32
 #define USE_HW_TIMER
+#else
+// Not needed on NRF52
+#define IRAM_ATTR
 #endif
 
 void IRAM_ATTR RadioLibInterface::timerCallback(void *p1, uint32_t p2)

src/mesh/StreamAPI.cpp

@@ -31,7 +31,7 @@ void StreamAPI::readStream()
             if (c != START2)
                 rxPtr = 0;                             // failed to find framing
         } else if (ptr >= HEADER_LEN) {                // we have at least read our 4 byte framing
-            uint16_t len = (rxBuf[2] << 8) + rxBuf[3]; // big endian 16 bit length follows framing
+            uint32_t len = (rxBuf[2] << 8) + rxBuf[3]; // big endian 16 bit length follows framing
 
             if (ptr == HEADER_LEN) {
                 // we _just_ finished our 4 byte header, validate length now (note: a length of zero is a valid

src/nrf52/NRF52CryptoEngine.cpp

@@ -0,0 +1,5 @@
+
+#include "CryptoEngine.h"
+
+// FIXME, do a NRF52 version
+CryptoEngine *crypto = new CryptoEngine();