removed conditional declare

RadioIQMixer_F32.cpp

@@ -38,14 +38,18 @@ void RadioIQMixer_F32::update(void) {
   if (!blockIn0)
      return;
 
-  if(twoChannel)  {
+  if(twoChannel)
+    {
     blockIn1 = AudioStream_F32::receiveWritable_f32(1);
-     if (!blockIn1) {
+    if (!blockIn1)
+       {
        AudioStream_F32::release(blockIn0);
        if(errorPrintIQM)  Serial.println("IQMIXER-ERR: No 1 input memory");
        return;
        }
     }
+  else
+    blockIn1 = NULL;
 
   // Try to get a pair of blocks for the IQ output
   blockOut_i = AudioStream_F32::allocate_f32();