environment: fix bug introduced by commit a8409f4f1ac8
env_get_char is not a function, but a pointer to one.
Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/environment.h b/include/environment.h
index 946a393..bf9f669 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -107,8 +107,8 @@
unsigned char data[ENV_SIZE]; /* Environment data */
} env_t;
-/* Function that returns a character from the environment */
-unsigned char (*env_get_char)(int);
+/* Pointer to function that returns a character from the environment */
+extern unsigned char (*env_get_char)(int);
/* Function that returns a pointer to a value from the environment */
unsigned char *env_get_addr(int);