Mark several functions/variables static

Spotted by parsing the output of `gcc -Wmissing-prototypes [...]`.

Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
diff --git a/ui-log.c b/ui-log.c
index 2f41602..857c05c 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -28,7 +28,7 @@
 
 #define COLUMN_COLORS_HTML_MAX (ARRAY_SIZE(column_colors_html) - 1)
 
-void count_lines(char *line, int size)
+static void count_lines(char *line, int size)
 {
 	if (size <= 0)
 		return;
@@ -40,7 +40,7 @@
 		rem_lines++;
 }
 
-void inspect_files(struct diff_filepair *pair)
+static void inspect_files(struct diff_filepair *pair)
 {
 	unsigned long old_size = 0;
 	unsigned long new_size = 0;
@@ -95,7 +95,7 @@
 	}
 }
 
-void print_commit(struct commit *commit, struct rev_info *revs)
+static void print_commit(struct commit *commit, struct rev_info *revs)
 {
 	struct commitinfo *info;
 	int cols = revs->graph ? 3 : 2;