gprofng: PR30195 [display text] Source code location can not be found

gprofng/ChangeLog
2023-03-10  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>

	PR gprofng/30195
	gprofng/src/DwarfLib.cc (DwrLineRegs::reset): Set 'file = 1;'.

gprofng/src/DwarfLib.cc

@@ -1687,7 +1687,7 @@ DwrLineRegs::reset ()
   timestamp = 0;
   file_size = 0;
   address = 0;
-  file = 0;
+  file = 1;
   line = 1;
   column = 0;
   is_stmt = (default_is_stmt != 0);