Revert "BUGFIX: STF & Step length estimation"

This reverts commit 0e8335b9.

src/IFOS2D.c

@@ -3278,7 +3278,7 @@ int main(int argc, char **argv){
                         /*------------------------------------------------------------------------------*/
                         /*time domain filtering of the source signal */
                         if(WAVETYPE==1||WAVETYPE==3){
-                            if(((TIME_FILT==1) || (TIME_FILT==2))){
+                            if(((TIME_FILT==1) || (TIME_FILT==2)) && (INV_STF==0)){
                                 timedomain_filt(signals,FC,ORDER,nsrc_loc,ns,1);
                             }
                             
@@ -3286,7 +3286,7 @@ int main(int argc, char **argv){
                         
                         /*time domain filtering of the source signal */
                         if(WAVETYPE==2||WAVETYPE==3){
-                            if(((TIME_FILT==1) || (TIME_FILT==2))){
+                            if(((TIME_FILT==1) || (TIME_FILT==2)) && (INV_STF==0)){
                                 timedomain_filt(signals_SH,FC,ORDER,nsrc_loc,ns,1);
                             }