update hotspot firmware; update modem firmware; allow FIFO sizes sent to modem to be zeroed if a digital mode is not enabled;

src/fw/hotspot

@@ -1 +1 @@
-Subproject commit f0fd328381f4a6509570481a8f71afc9828aef90
+Subproject commit 13e51c67719f4983be7504967baf591f21375cb7

src/fw/modem

@@ -1 +1 @@
-Subproject commit c81ba8e0cec74115d1e06b83a4af9edf475875e5
+Subproject commit 7010670d960d480f0d227b54db0a0d595ff436a7

src/host/modem/Modem.cpp

@@ -364,6 +364,13 @@ void Modem::setFifoLength(uint16_t dmrLength, uint16_t p25Length, uint16_t nxdnL
     if (m_nxdnFifoLength < NXDN_TX_BUFFER_LEN)
         m_nxdnFifoLength = NXDN_TX_BUFFER_LEN;
 
+    if (!m_dmrEnabled && m_dmrFifoLength > 0U)
+        m_dmrFifoLength = 0U;
+    if (!m_p25Enabled && m_p25FifoLength > 0U)
+        m_p25FifoLength = 0U;
+    if (!m_nxdnEnabled && m_nxdnFifoLength > 0U)
+        m_nxdnFifoLength = 0U;
+
     uint8_t buffer[9U];
 
     buffer[0U] = DVM_SHORT_FRAME_START;