update bundled_deps

bundled_deps/libigl/igl/is_stl.h

@@ -0,0 +1,21 @@
+#ifndef IGL_IS_STL_H
+#define IGL_IS_STL_H
+#include "igl_inline.h"
+#include <cstdio>
+namespace igl
+{
+  // Given a file pointer, determine if it contains an .stl file and then
+  // rewind it.
+  // 
+  // Inputs:
+  //   stl_file  pointer to file 
+  // Outputs:
+  //   is_ascii  flag whether stl is ascii
+  // Returns  whether stl_file is an .stl file
+  IGL_INLINE bool is_stl(FILE * stl_file, bool & is_ascii);
+  IGL_INLINE bool is_stl(FILE * stl_file);
+};
+#ifndef IGL_STATIC_LIBRARY
+#  include "is_stl.cpp"
+#endif
+#endif