tvheadend: fix compilation with GCC 7.3

Disable two warnings to enable compilation with GCC 7.3

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

multimedia/tvheadend/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=tvheadend
 PKG_VERSION:=4.0.9
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)
 PKG_SOURCE_VERSION:=v$(PKG_VERSION)
@@ -76,6 +76,8 @@ CONFIGURE_ARGS += \
 	--disable-libav \
 	--enable-bundle
 
+TARGET_CFLAGS += -Wno-error=pointer-compare -Wno-error=misleading-indentation
+
 define Build/Prepare
 	$(call Build/Prepare/Default)
 	echo 'Tvheadend $(shell echo $(PKG_SOURCE_VERSION) | sed "s/^v//")~openwrt$(PKG_RELEASE)' \