avoid crash when no tdc timestamps available

tpx3_clusters.cpp

@@ -43,7 +43,7 @@ int tpx3_clusters(string filename, long nhits=-1) {
    ttdc->SetEstimate(-1);
    ttdc->Draw("ts","type==0||type==2","goff");
    tdc = ttdc->GetV1();
-   cout << tdc[0] << ' ' << endl;
+   if (ntrig>0) cout << tdc[0] << ' ' << endl;
 
    const Int_t kMaxPixel=300; // maximum allowed cluster size
    Int_t npix;
@@ -152,8 +152,12 @@ int tpx3_clusters(string filename, long nhits=-1) {
 	   //mx+=xpix[npix];
 	   //my+=ypix[npix];
 	   //etot+=epix[npix];
-            tof[npix] = (Double_t) (t[j]*1.5625E-9 - t0find(ntrig, tdc, t[j]*1.5625E-9) ) ;
-            npix++;
+            if (ntrig>0) {
+                // calculate ToF only when TDC timestamps are available
+                tof[npix] = (Double_t) (t[j]*1.5625E-9 - t0find(ntrig, tdc, t[j]*1.5625E-9) ) ;
+            }
+                npix++;
+
         }
        }
        //if (npix!=0) {

tpx3_to_root.cpp

@@ -278,7 +278,7 @@ int tpx3_to_root(string filename, unsigned long nrawpixelhits=0) {
                     tmpfine = ((tmpfine-1) << 9) / 12;     // subtract 1 (as fractions 0 to 11 are numbered 1 to 12), then shift by 9 positions to reduce the error coming from the integer division by 12 
                     int trigtime_fine = (temp & 0x0000000000000E00) | (tmpfine & 0x00000000000001FF);   // combine the 3 bits with a size of 3.125 ns with the rest of the fine time from the 12 clock phases
                     double time_unit=25./4096;
-                    tdc_time = (coarsetime*25E-9 + trigtime_fine*time_unit*1E-9);
+                    tdc_time = ((double)coarsetime*25E-9 + trigtime_fine*time_unit*1E-9);
                     //if (count<20) { 
                     //    cout << count << ' ' << trigcnt << ' ' << hex << temp << dec << endl; 
                     //    cout << "tdc_chan: " << tdc_chan << " edge_type: " << edge_type << " tdc_time: " << setprecision(15) <<  tdc_time << endl;