Memory leak in tinyobj_parse_and_index_mtl_file

[Snigel]

Memory is allocates for line_infos by get_line_infos, but the memory is never free'd.

Adding TINYOBJ_FREE(line_infos); at the end if the function solves this.

[Syoyo Fujita]

line_infos are freed at here:

tinyobjloader-c/tinyobj_loader_c.h

Line 1402 in 574390b

 TINYOBJ_FREE(line_infos); 

but may be not free'ed in tinyobj_parse_and_index_mtl_file:

tinyobjloader-c/tinyobj_loader_c.h

Line 824 in 574390b

 static int tinyobj_parse_and_index_mtl_file(tinyobj_material_t **materials_out, 

You can send us PR!

[Syoyo Fujita]

Closed via #54