android: fix nanf detection

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

configure.ac

@@ -696,6 +696,9 @@ AC_CHECK_LIB(m,lrintf, [
   AC_DEFINE(HAVE_LRINTF, 1, [Define to 1 if you have the lrintf function])
   VLC_ADD_LIBS([skins2],[-lm])
 ])
+AC_CHECK_LIB(m,nanf,
+  AC_DEFINE(HAVE_NANF, 1, [Define to 1 if you have the NANF function])
+)
 
 dnl Check for dynamic plugins
 LIBDL=""

include/vlc_fixups.h

@@ -353,7 +353,7 @@ long nrand48 (unsigned short subi[3]);
 
 /* math.h */
 
-#ifdef __ANDROID__
+#ifndef HAVE_NANF
 #define nanf(tagp) NAN
 #endif