make: Use -Wno-maybe-uninitialized

This has way too many false positives and is beholden to a lot of
compiler heuristics, and is affected by -fexception and -flto.

Closes #215.

Makefile

@@ -1,6 +1,7 @@
 CFLAGS := -std=gnu11 -O2 -Wall -Wextra -Wshadow -Wpointer-arith \
 	  -Wcast-align -Wmissing-prototypes -Wstrict-overflow -Wformat=2 \
 	  -Wwrite-strings -Warray-bounds -Wstrict-prototypes \
+	  -Wno-maybe-uninitialized \
 	  -Werror $(CFLAGS)
 CPPFLAGS += -I/usr/X11R6/include -L/usr/X11R6/lib
 LDLIBS += -lX11 -lXfixes

src/clipmenu.c

@@ -136,7 +136,6 @@ static int _nonnull_ interact_with_dmenu(struct config *cfg, int *input_pipe,
     int forced_ret = 0;
     if (str_to_uint64(sel_idx_str, &sel_idx) < 0 || sel_idx == 0 ||
         sel_idx > cur_clips) {
-        *out_hash = HASH_INVALID;
         forced_ret = EXIT_FAILURE;
     } else {
         *out_hash = idx_to_hash[sel_idx - 1];
@@ -180,7 +179,7 @@ int main(int argc, char *argv[]) {
     uint64_t hash;
     int dmenu_exit_code = prompt_user_for_hash(&cfg, &hash);
 
-    if (dmenu_exit_code == EXIT_SUCCESS && hash != HASH_INVALID) {
+    if (dmenu_exit_code == EXIT_SUCCESS) {
         run_clipserve(hash);
     }
 

src/clipserve.c

@@ -95,11 +95,10 @@ static void _nonnull_ serve_clipboard(uint64_t hash,
 }
 
 int main(int argc, char *argv[]) {
-    uint64_t hash = HASH_INVALID;
-
     die_on(argc != 2, "Usage: clipserve [hash]\n");
     _drop_(config_free) struct config cfg = setup("clipserve");
 
+    uint64_t hash;
     expect(str_to_uint64(argv[1], &hash) == 0);
 
     _drop_(close) int content_dir_fd = open(get_cache_dir(&cfg), O_RDONLY);

src/util.h

@@ -23,7 +23,6 @@
 #endif
 
 #define UINT64_MAX_STRLEN 20 // (1 << 64) - 1 is 20 digits wide
-#define HASH_INVALID UINT64_MAX
 
 #define streq(a, b) (strcmp((a), (b)) == 0)
 #define strceq(a, b) (strcasecmp((a), (b)) == 0)