make it compile under mingw32 --without-curl --without-taglib

ncmpcpp can be built for windows \o/
pdcurses and regex libraries are needed for this though.

src/window.cpp

@@ -23,6 +23,11 @@
 
 #include "window.h"
 
+/// FIXME: dirty workaround.
+#ifdef WIN32
+# define wcwidth(x) 1
+#endif // WIN32
+
 using namespace NCurses;
 
 using std::string;