Update to latest version of C library.

Should hopefully solve #37.

Author: mittinatten

lib

@@ -135,9 +135,10 @@ cdef extern from "freesasa.h":
                                                   const freesasa_classifier* classifier,
                                                   int options)
 
-    freesasa_structure* freesasa_structure_get_chains(
-                                                const freesasa_structure *structure,
-                                                const char *chains)
+    freesasa_structure* freesasa_structure_get_chains(const freesasa_structure *structure,
+                                                      const char *chains,
+                                                      const freesasa_classifier *classifier,
+                                                      int options)
 
     freesasa_structure* freesasa_structure_new()
 
@@ -238,4 +239,4 @@ cdef extern from "freesasa.h":
     const freesasa_result * freesasa_node_structure_result(const freesasa_node *node)
 
 cdef extern from "freesasa_internal.h":
-    int freesasa_write_pdb(FILE *output, freesasa_node *structure)
+    int freesasa_write_pdb(FILE *output, freesasa_node *structure)

src/cfreesasa.pxd

@@ -502,7 +502,7 @@ def structureArray(fileName,
         for i in range(0, n):
             for j, chainID_group in enumerate(chain_groups):
                 idx = j + (i * n_groups) + n
-                group = freesasa_structure_get_chains(sArray[i], chainID_group)
+                group = freesasa_structure_get_chains(sArray[i], chainID_group, NULL, structure_options)
                 sArray[idx] = group
         n = n_total