Bump version to 0.10.7

This fixes a potential segfault when libnfc is not correctly initialized

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([mfoc],[0.10.6],[mifare@nethemba.com])
+AC_INIT([mfoc],[0.10.7],[mifare@nethemba.com])
 
 AC_CONFIG_MACRO_DIR([m4])
 
@@ -8,7 +8,7 @@ AC_CONFIG_HEADERS([config.h])
 
 AC_CONFIG_SRCDIR([src/mfoc.c])
 
-AM_INIT_AUTOMAKE
+AM_INIT_AUTOMAKE(dist-bzip2 no-dist-gzip)
 
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 

src/mfoc.c

@@ -204,10 +204,13 @@ int main(int argc, char *const argv[])
   	for (i=0;!nfc_initiator_select_passive_target(r.pdi, nm, NULL, 0, &t.nt) && i < 10; i++) zsleep (100);
   */
 
-  // mf_select_tag(r.pdi, &(t.nt));
-  if (nfc_initiator_select_passive_target(r.pdi, nm, NULL, 0, &t.nt) < 0) {
+  int tag_count;
+  if ((tag_count = nfc_initiator_select_passive_target(r.pdi, nm, NULL, 0, &t.nt)) < 0) {
     nfc_perror(r.pdi, "nfc_initiator_select_passive_target");
     goto error;
+  } else if (tag_count == 0) {
+    ERR("No tag found.");
+    goto error;
   }
 
   // Test if a compatible MIFARE tag is used
@@ -579,6 +582,10 @@ void mf_init(mfreader *r)
 {
   // Connect to the first NFC device
   nfc_init(&context);
+  if (context == NULL) {
+    ERR("Unable to init libnfc (malloc)");
+    exit(EXIT_FAILURE);
+  }
   r->pdi = nfc_open(context, NULL);
   if (!r->pdi) {
     printf("No NFC device found.\n");