Fix compiler warning nits

files.c

@@ -98,14 +98,16 @@ file_t *load_file(file_t **files, const char *filename)
 
   skip_mmap:
     f->mmapped = false;
-    size_t capacity = 1000;
-    length = 0;
-    f->memory = xcalloc(sizeof(char), capacity);
-    ssize_t just_read;
-    while ((just_read=read(fd, &f->memory[length], capacity - length)) > 0) {
-        length += (size_t)just_read;
-        if (length >= capacity)
-            f->memory = xrealloc(f->memory, sizeof(char)*(capacity *= 2) + 1);
+    {
+        size_t capacity = 1000;
+        length = 0;
+        f->memory = xcalloc(sizeof(char), capacity);
+        ssize_t just_read;
+        while ((just_read=read(fd, &f->memory[length], capacity - length)) > 0) {
+            length += (size_t)just_read;
+            if (length >= capacity)
+                f->memory = xrealloc(f->memory, sizeof(char)*(capacity *= 2) + 1);
+        }
     }
 
   finished_loading:

match.c

@@ -472,7 +472,7 @@ static match_t *match(def_t *defs, file_t *f, const char *str, pat_t *pat, bool
             return p ? new_match(pat, str, p->end, p) : NULL;
         }
         default: {
-            errx(EXIT_FAILURE, "Unknown pattern type: %d", pat->type);
+            errx(EXIT_FAILURE, "Unknown pattern type: %u", pat->type);
             return NULL;
         }
     }

print.c

@@ -274,9 +274,8 @@ static void _print_match(FILE *out, printer_t *pr, match_t *m)
             _print_match(out, pr, m->child);
             return;
         }
-        size_t line_start = get_line_number(pr->file, m->start);
+        size_t line = get_line_number(pr->file, m->start);
         size_t line_end = get_line_number(pr->file, m->end);
-        size_t line = line_start;
 
         if (pr->use_color && current_color != color_replace) {
             fprintf(out, "%s", color_replace);

utils.c

@@ -26,6 +26,7 @@ const char *after_spaces(const char *str)
             while (*str && *str != '\n') ++str;
             goto skip_whitespace;
         }
+        default: break;
     }
     return str;
 }