lib/run_part: Reduce visibility

The run_part function is only used in run_part.c itself, so no
need to expose it to other files.

Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>

lib/run_part.c

@@ -15,7 +15,7 @@
 #include "shadowlog_internal.h"
 
 
-int run_part (char *script_path, const char *name, const char *action)
+static int run_part (char *script_path, const char *name, const char *action)
 {
 	pid_t pid;
 	int wait_status;

lib/run_part.h

@@ -1,7 +1,6 @@
 #ifndef _RUN_PART_H
 #define _RUN_PART_H
 
-int run_part (char *script_path, const char *name, const char *action);
 int run_parts (const char *directory, const char *name, const char *action);
 
 #endif /* _RUN_PART_H */