Fix nullpointer when recovery.fstab does not define a "misc" partition

Change-Id: I57437e3c637a1c619d254a3fc025db19ffe53c10
diff --git a/bootloader.c b/bootloader.c
index b690c55..f3dc268 100644
--- a/bootloader.c
+++ b/bootloader.c
@@ -30,23 +30,33 @@
 
 int get_bootloader_message(struct bootloader_message *out) {
     Volume* v = volume_for_path("/misc");
-    if (strcmp(v->fs_type, "mtd") == 0) {
-        return get_bootloader_message_mtd(out, v);
-    } else if (strcmp(v->fs_type, "emmc") == 0) {
-        return get_bootloader_message_block(out, v);
+    if(v)
+    {
+        if (strcmp(v->fs_type, "mtd") == 0) {
+                return get_bootloader_message_mtd(out, v);
+        } else if (strcmp(v->fs_type, "emmc") == 0) {
+                return get_bootloader_message_block(out, v);
+        }
+        LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type);
+        return -1;
     }
-    LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type);
+    LOGE("no misc partition\n");
     return -1;
 }
 
 int set_bootloader_message(const struct bootloader_message *in) {
     Volume* v = volume_for_path("/misc");
-    if (strcmp(v->fs_type, "mtd") == 0) {
-        return set_bootloader_message_mtd(in, v);
-    } else if (strcmp(v->fs_type, "emmc") == 0) {
-        return set_bootloader_message_block(in, v);
+    if(v)
+    {
+        if (strcmp(v->fs_type, "mtd") == 0) {
+            return set_bootloader_message_mtd(in, v);
+        } else if (strcmp(v->fs_type, "emmc") == 0) {
+            return set_bootloader_message_block(in, v);
+        }
+        LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type);
+        return -1;
     }
-    LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type);
+    LOGE("no misc partition\n");
     return -1;
 }