rdi_format_parse: prefer line info idxs with file coordinates in line mapping helper

src/lib_rdi_format/rdi_format_parse.c

@@ -302,6 +302,14 @@ rdi_line_info_idx_from_voff(RDI_ParsedLineTable *line_info, RDI_U64 voff)
 {
   RDI_U64 count = 0;
   RDI_U64 result = rdi_line_info_idx_range_from_voff(line_info, voff, &count);
+  for(RDI_U64 idx = 0; idx < count && result+idx < line_info->count; idx += 1)
+  {
+    if(line_info->lines[result+idx].file_idx != 0)
+    {
+      result += idx;
+      break;
+    }
+  }
   return result;
 }