bug 1362: fixed some compiler warnings in LCS/Common

LCS/Common/src/Backtrace.cc

@@ -42,7 +42,10 @@ namespace LOFAR
     itsNrAddr(0)
   {
     memset(itsAddr, 0, maxNrAddr*sizeof(void*));
-    itsNrAddr = backtrace(itsAddr, maxNrAddr);
+
+    int nraddrs = backtrace(itsAddr, maxNrAddr);
+
+    itsNrAddr = nraddrs >= 0 ? nraddrs : 0;
   }
 
   void Backtrace::print(ostream& os) const
@@ -57,7 +60,7 @@ namespace LOFAR
     ios::fmtflags flags(os.flags());
 
     os.setf(ios::left);
-    for(int i = 1; i < itsNrAddr; ++i) {
+    for(unsigned i = 1; i < itsNrAddr; ++i) {
       if (i > 1) os << endl;
       os << "#" << setw(2) << i-1
          << " " << itsAddr[i];

LCS/Common/src/Net/Socket.cc

@@ -180,6 +180,9 @@ Socket::~Socket()
 
 	if (itsIsServer && (itsType == Socket::UNIX) && itsUnixAddr.sun_path[0]) {
 		int32 result = unlink(itsUnixAddr.sun_path);
+
+                (void)result;
+
 		LOG_TRACE_FLOW(formatString("unlink(%s) = %d (%s)", itsUnixAddr.sun_path,
 						(result < 0) ? errno : result, 
 						(result < 0) ? strerror(errno) :" OK"));
@@ -312,6 +315,8 @@ int32 Socket::initUnixSocket(bool		asServer)
 	LOG_TRACE_CALC(formatString("Socket::initUnixSocket(%s,%d)",
 		itsSocketname.c_str(), asServer));
 
+        (void)asServer;        
+
 	// setup socket address
 	string path = itsPort;
 	itsUnixAddr.sun_family = AF_UNIX;

LCS/Common/src/Numeric.cc

@@ -33,8 +33,14 @@ namespace LOFAR
 
   bool Numeric::isFinite(float f)
   {
-    floatMask_t exponent = *(floatMask_t*)&f & floatExponentMask;
-    return exponent != floatExponentMask;
+    union {
+      floatMask_t mask;
+      float       f;
+    } exponent;
+
+    exponent.f = f;
+    //floatMask_t exponent = *reinterpret_cast<floatMask_t*>(&f) & floatExponentMask;
+    return exponent.mask & floatExponentMask != floatExponentMask;
   }
 
   bool Numeric::isFinite(double d)