Fix config_IsSafe() declaration warning

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

src/config/configuration.h

@@ -61,6 +61,8 @@ static inline bool IsConfigFloatType (int type)
 
 extern vlc_rwlock_t config_lock;
 
+bool config_IsSafe (const char *);
+
 /* The configuration file */
 #define CONFIG_FILE                     "vlcrc"
 

src/libvlc.h

@@ -235,8 +235,6 @@ extern const size_t libvlc_config_count;
  * Variables stuff
  */
 void var_OptionParse (vlc_object_t *, const char *, bool trusted);
-bool config_IsSafe (const char *);
-
 
 /*
  * Stats stuff

src/misc/variables.c

@@ -37,6 +37,7 @@
 #endif
 
 #include "libvlc.h"
+#include "config/configuration.h"
 
 #include <assert.h>
 #include <math.h>