Check core max allocations for valid handle

fix rolo warnings

Change-Id: Ia2c669a5517aec54e5b2c0dc5934c88a4f49f2a9

apps/radio/radioart.c

@@ -33,6 +33,7 @@
 #include "string-extra.h"
 #include "pathfuncs.h"
 #include "core_alloc.h"
+#include "splash.h"
 
 #define MAX_RADIOART_IMAGES 10
 struct radioart {
@@ -202,6 +203,12 @@ void radioart_init(bool entering_screen)
         /* grab control over buffering */
         size_t bufsize;
         int handle = core_alloc_maximum("radioart", &bufsize, &radioart_ops);
+        if (handle <0)
+        {
+            splash(HZ, "Radioart Failed - OOM");
+            return;
+        }
+
         buffering_reset(core_get_data(handle), bufsize);
         buf = core_get_data(handle);
         /* one-shot */

apps/tagtree.c

@@ -1258,6 +1258,9 @@ void tagtree_init(void)
     menu = NULL;
     rootmenu = -1;
     tagtree_handle = core_alloc_maximum("tagtree", &tagtree_bufsize, &ops);
+    if (tagtree_handle < 0)
+        panicf("tagtree OOM");
+
     if (!parse_menu(FILE_SEARCH_INSTRUCTIONS))
     {
         tagtree_unload(NULL);

firmware/rolo.c

@@ -244,7 +244,7 @@ int rolo_load(const char* filename)
     rolo_handle = core_alloc_maximum("rolo", &filebuf_size, NULL);
     if (rolo_handle < 0)
     {
-        splash(HZ, "Rolo Failed - OOM");
+        rolo_error("OOM");
         return -1;
     }