tvheadend: remove -Werror from CFLAGS

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>

diff -durN tvheadend-c84bc2b72b462ef2dbed305f3fd0bb3fa5046fc3.orig/Makefile tvheadend-c84bc2b72b462ef2dbed305f3fd0bb3fa5046fc3/Makefile
--- tvheadend-c84bc2b72b462ef2dbed305f3fd0bb3fa5046fc3.orig/Makefile	2014-03-09 14:50:48.437688482 +0100
+++ tvheadend-c84bc2b72b462ef2dbed305f3fd0bb3fa5046fc3/Makefile	2014-03-09 14:54:00.411418749 +0100
@@ -28,7 +28,7 @@
 #
 
 CFLAGS  += -g -O2
-CFLAGS  += -Wall -Werror -Wwrite-strings -Wno-deprecated-declarations
+CFLAGS  += -Wall -Wwrite-strings -Wno-deprecated-declarations
 CFLAGS  += -Wmissing-prototypes
 CFLAGS  += -fms-extensions -funsigned-char -fno-strict-aliasing
 CFLAGS  += -D_FILE_OFFSET_BITS=64