Minor opencl build corrections.

Makefile.am

@@ -45,7 +45,7 @@ cgminer_SOURCES	+= elist.h miner.h compat.h bench_block.h	\
 
 cgminer_SOURCES	+= logging.c
 
-if HAVE_OPENCL
+if HAS_OPENCL
 bin_SCRIPTS	= $(top_srcdir)/*.cl
 
 cgminer_SOURCES += driver-opencl.h driver-opencl.c

cgminer.c

@@ -4968,8 +4968,10 @@ static void *input_thread(void __maybe_unused *userdata)
 			display_pools();
 		else if (!strncasecmp(&input, "s", 1))
 			set_options();
+#if HAVE_OPENCL
 		else if (have_opencl && !strncasecmp(&input, "g", 1))
 			manage_gpu();
+#endif
 		if (opt_realquiet) {
 			disable_curses();
 			break;

configure.ac

@@ -171,6 +171,7 @@ else
 	OPENCL_FLAGS=""
 	OPENCL_LIBS=""
 fi
+AM_CONDITIONAL([HAS_OPENCL], [test x$opencl = xyes])
 
 has_winpthread=false
 if test "x$have_win32" = xtrue; then