example/stb-imagedumper: -demo doesn't read stdin

example/stb-imagedumper/stb-imagedumper.c

diff --git a/example/stb-imagedumper/stb-imagedumper.c b/example/stb-imagedumper/stb-imagedumper.c
index 84d7e8d..a77ee24 100644
--- a/example/stb-imagedumper/stb-imagedumper.c
+++ b/example/stb-imagedumper/stb-imagedumper.c
@@ -1151,15 +1151,15 @@
       handle(demos[c].filename, demos[c].src_len, demos[c].src_ptr,
              demos[c].src_len);
     }
+
+  } else if (g_flags.remaining_argc == 0) {
+    handle("/dev/stdin", 0, NULL, 0);
   }
 
   for (int c = 0; c < g_flags.remaining_argc; c++) {
     const char* filename = g_flags.remaining_argv[c];
     handle(filename, get_filesize(filename), NULL, 0);
   }
-  if (g_flags.remaining_argc == 0) {
-    handle("/dev/stdin", 0, NULL, 0);
-  }
 
   return 0;
 }