Fix ncurses underlinking by using the pkg-config output instead of assuming
-lncurses/-lncursesw to be enough. In addition, fix wrong modplug include
directive. See also:
https://bugs.gentoo.org/show_bug.cgi?id=573522

--- a/configure
+++ b/configure
@@ -215,7 +215,7 @@
 	exit 1
 fi
 CFLAGS_main="-DAUDIO_OUTPUT=\\\"$CFG_AO\\\" -DCONFFILE=\\\"$CONFFILE\\\""
-LDFLAGS="$LDFLAGS -L$PREFIX/lib -l$CFG_CURSES_LIB"
+LDFLAGS="$LDFLAGS -L$PREFIX/lib `${PKG_CONFIG} --libs $CFG_CURSES_LIB`"
 SRCS="audio_file audio_output_$CFG_AO config gui_browser gui_draw \
     gui_input gui_msgbar gui_playq gui_vfslist main playq playq_party \
     playq_xmms vfs vfs_playlist vfs_regular"
--- a/src/audio_format_modplug.c
+++ b/src/audio_format_modplug.c
@@ -31,7 +31,7 @@
 #include "stdinc.h"
 
 #include <sys/mman.h>
-#include <modplug.h>
+#include <libmodplug/modplug.h>
 
 #include "audio_file.h"
 #include "audio_format.h"
--- a/src/main.c
+++ b/src/main.c
@@ -165,7 +165,7 @@
 #endif /* CLOSE_STDERR */
 	if ((errmsg = vfs_lockup()) != NULL) {
 		gui_draw_init_abort();
-		g_printerr(errmsg);
+		g_printerr("%s", errmsg);
 		return (1);
 	}