dr_40.c: Fix syntax error and include in Makefile.am

The descriptor 0x40 was not included in src/Makefile.am. Therefor
syntax errors where not picked up. This patch adds the descriptor
to the src/Makefile.am and fixes a typo.
Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

src/Makefile.am

@@ -36,6 +36,7 @@ pkginclude_HEADERS = dvbpsi.h psi.h descriptor.h demux.h \
                      descriptors/dr_0f.h \
                      descriptors/dr_13.h \
                      descriptors/dr_14.h \
+		     descriptors/dr_40.h \
                      descriptors/dr_42.h \
                      descriptors/dr_43.h \
                      descriptors/dr_44.h \
@@ -75,6 +76,7 @@ descriptors_src = descriptors/dr_02.c \
                   descriptors/dr_0f.c \
                   descriptors/dr_13.c \
                   descriptors/dr_14.c \
+		  descriptors/dr_40.c \
                   descriptors/dr_42.c \
                   descriptors/dr_43.c \
                   descriptors/dr_44.c \

src/descriptors/dr_40.c

 /*
  * dr_40.c
- * Copyright (C) 2001-2011 VideoLAN
+ * Copyright (C) 2001-2012 VideoLAN
  *
  * Authors: rcorno (Nov 22, 2011)
  *
@@ -62,7 +62,7 @@ dvbpsi_network_name_dr_t* dvbpsi_DecodeNetworkNameDr(
 
     /* Decode data */
     p_decoded->i_name_length = p_descriptor->i_length <= 255 ?
-                               p_descriptor->i_lenght : 255;
+                               p_descriptor->i_length : 255;
     if (p_decoded->i_name_length)
         memcpy(p_decoded->i_name_byte,
                p_descriptor->p_data,