Task #11013: fix TBB_Writer linkage problem wrt static const var member init....

Task #11013: fix TBB_Writer linkage problem wrt static const var member init. Shows up only on some versions of GCC when building in debug mode (no opts). Supplements r38180

RTCP/Cobalt/OutputProc/src/TBB_Frame.cc

@@ -45,6 +45,11 @@ namespace LOFAR
     }
 
 
+    const unsigned TBB_Frame::transientFrameSize = sizeof(TBB_Header) +
+              DEFAULT_TBB_TRANSIENT_NSAMPLES * sizeof(int16_t) + /*crc32:*/sizeof(uint32_t);
+    const unsigned TBB_Frame::spectralFrameSize = sizeof(TBB_Header) +
+              MAX_TBB_SPECTRAL_NSAMPLES * 2 * sizeof(int16_t) + /*crc32:*/sizeof(uint32_t);
+
     unsigned TBB_Header::getFirstBandSelNr() const
     {
       // 64 bit scans would be ~8x faster, but require fixes for band order (and endian)

RTCP/Cobalt/OutputProc/src/TBB_Frame.h

@@ -101,10 +101,8 @@ namespace LOFAR
     };
 
     struct TBB_Frame {
-      static const unsigned transientFrameSize = sizeof(TBB_Header) +
-              DEFAULT_TBB_TRANSIENT_NSAMPLES * sizeof(int16_t) + /*crc32:*/sizeof(uint32_t);
-      static const unsigned spectralFrameSize = sizeof(TBB_Header) +
-              MAX_TBB_SPECTRAL_NSAMPLES * 2 * sizeof(int16_t) + /*crc32:*/sizeof(uint32_t);
+      static const unsigned transientFrameSize;
+      static const unsigned spectralFrameSize;
 
       TBB_Header header;
       TBB_Payload payload;