Fix libcec configure to work with v1.5

The detection code contained within the mythtv/configure script is mismatched
to the implementation code contained within libs/libmythui/cecadapter.cpp.

The configure script also checks for the deprecated LoadLibCec() function,
which has been removed from libcec version 1.5 whereas
libs/libmythui/cecadapter.cpp has already been switched to use the new
LibCecInit() function.

Increases the minimum version of libcec to 1.5.

Fixes #10366

Signed-off-by: Gavin Hurlbut <ghurlbut@mythtv.org>

mythtv/configure

@@ -107,7 +107,8 @@ Advanced options (experts only):
   --disable-joystick-menu  disable joystick menu
   --disable-libcec         disable libCEC device support
   --libcec-path=HDRLOC     location of directory containing
-                           cec.h [$libcec_path_default]
+                           'libcec/cec.h', not the directory
+                           with 'cec.h' [$libcec_path_default]
   --disable-firewire       disable support for FireWire cable boxes
   --disable-iptv           disable support for recording RTSP/UDP/RTP streams
   --disable-hdhomerun      disable support for HDHomeRun boxes
@@ -2024,7 +2025,7 @@ disable indevs
 # mythtv paths
 dvb_path_default="${sysroot}/usr/include"
 x11_path_default="${sysroot}/usr/X11R6/include"
-libcec_path_default="${sysroot}/usr/include/libcec"
+libcec_path_default="${sysroot}/usr/include"
 libxml2_path_default="${sysroot}/usr/include/libxml2"
 
 # configurable options
@@ -4138,9 +4139,9 @@ using namespace std;
 using namespace CEC;
 #include <libcec/cecloader.h>
 int main(void) {
-    if (CEC_LIB_VERSION_MAJOR < 1)
+    if (CEC_LIB_VERSION_MAJOR < 1 && CEC_LIB_VERSION_MINOR < 5)
         return 0;
-    return (long) LoadLibCec;
+    return (long) LibCecInit;
 }
 EOF
 fi

mythtv/libs/libmythui/cecadapter.cpp

@@ -18,12 +18,11 @@
 #define MAX_CEC_DEVICES 10
 #define LOC QString("CECAdapter: ")
 
-#include "cec.h"
-#include "cecc.h"
+#include <libcec/cec.h>
 #include <iostream>
 using namespace CEC;
 using namespace std;
-#include "cecloader.h"
+#include <libcec/cecloader.h>
 
 QMutex* CECAdapter::gLock = new QMutex(QMutex::Recursive);