Fix bootloader error reporting as per patch FS#7314. Thanks again to James Teh.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13662 a1c6a512-1295-4272-9138-f99709370657
diff --git a/bootloader/iriver_h300.c b/bootloader/iriver_h300.c
index a25e3ae..79d8cba 100644
--- a/bootloader/iriver_h300.c
+++ b/bootloader/iriver_h300.c
@@ -356,7 +356,7 @@
     printf("Loading firmware");
     i = load_firmware((unsigned char *)DRAM_START, BOOTFILE, MAX_LOADSIZE);
     if(i < 0)
-        printf("Error: %d", strerror(i));
+        printf("Error: %s", strerror(i));
 
     if (i == EOK)
         start_firmware();
diff --git a/bootloader/main.c b/bootloader/main.c
index 1117b64..ac9a7ad 100644
--- a/bootloader/main.c
+++ b/bootloader/main.c
@@ -565,7 +565,7 @@
     printf("Loading firmware");
     i = load_firmware((unsigned char *)DRAM_START, BOOTFILE, MAX_LOADSIZE);
     if(i < 0)
-        printf("Error: %d", strerror(i));
+        printf("Error: %s", strerror(i));
 
     if (i == EOK)
         start_firmware();