Fix a bunch of obvious memory leaks at termination

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

src/config/color.c

@@ -430,13 +430,18 @@ out:
 }
 
 void
-color_pair_cache_reset(void)
+color_pair_cache_free(void)
 {
     if (cache.pairs) {
         free(cache.pairs);
         memset(&cache, 0, sizeof(cache));
     }
+}
 
+void
+color_pair_cache_reset(void)
+{
+    color_pair_cache_free();
     /*
      * COLOR_PAIRS is actually not a macro and is thus not a
      * compile-time constant

src/config/color.h

@@ -61,5 +61,7 @@ int color_pair_cache_hash_str(const char* str, color_profile profile);
 int color_pair_cache_get(const char* pair_name);
 /* clear cache */
 void color_pair_cache_reset(void);
+/* free cache */
+void color_pair_cache_free(void);
 
 #endif

src/config/theme.c

@@ -251,6 +251,7 @@ theme_list(void)
 void
 theme_close(void)
 {
+    color_pair_cache_free();
     if (theme) {
         g_key_file_free(theme);
         theme = NULL;