Fix -fanalyzer errors so frogfs builds with CONFIG_COMPILER_STATIC_ANALYZER=y

src/decomp_miniz.c

@@ -46,6 +46,7 @@ static int open_miniz(frogfs_fh_t *f, unsigned int flags)
         /* gzip */
         if (*(p + 2) != 8) {
             LOGE("unsupported gzip compression method");
+            free(priv);
             return -1;
         }
         priv->data += 10;

src/frogfs.c

@@ -191,6 +191,10 @@ const frogfs_entry_t *frogfs_get_entry(const frogfs_fs_t *fs, const char *path)
     do {
         entry = (const void *) fs->head + e->offs;
         char *match = frogfs_get_path(fs, entry);
+        if (!match) {
+            /* out of memory */
+            return NULL;
+        }
         if (strcmp(path, match) == 0) {
             free(match);
             LOGV("entry %d", middle);

src/vfs.c

@@ -187,9 +187,13 @@ static DIR* frogfs_vfs_opendir(void *ctx, const char *path)
 {
     frogfs_vfs_t *vfs = (frogfs_vfs_t *) ctx;
     frogfs_vfs_dh_t *dh = malloc(sizeof(*dh));
+    if (!dh) {
+        return NULL;
+    }
 
     const frogfs_entry_t *entry = frogfs_get_entry(vfs->fs, path);
     if (entry == NULL) {
+        free(dh);
         return NULL;
     }