grub_git: fix build warning->error

This patch fixes a build warning which is promoted to an error via -Werror.

changes from v1:
 * put "Upstream-Status" in patch itself, not in OE patch header
 * fix commit wording

(From OE-Core rev: 4b41f4199d77144a629897173cff3d1efcfa85f9)

Signed-off-by: Trevor Woerner <trevor.woerner@linaro.org>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-bsp/grub/grub/asciih-fix-build-warning-error.patch

@@ -0,0 +1,34 @@
+util/grub-gen-asciih.c: fix build warning->error
+
+A potential problem is flagged by the compiler and generates a warning. This
+warning is promoted to an error via -Werror. This patch fixes the original
+issue, avoids the warning, and therefore avoids the build error.
+
+Upstream-Status: Pending
+
+Index: git/util/grub-gen-asciih.c
+===================================================================
+--- git.orig/util/grub-gen-asciih.c
++++ git/util/grub-gen-asciih.c
+@@ -131,6 +131,8 @@ write_font_ascii_bitmap (FILE *file, FT_
+   struct grub_glyph_info glyph;
+   int char_code;
+ 
++  memset (&glyph, 0, sizeof(glyph));
++
+   fprintf (file, "/* THIS CHUNK OF BYTES IS AUTOMATICALLY GENERATED */\n");
+   fprintf (file, "unsigned char ascii_bitmaps[] =\n");
+   fprintf (file, "{\n");
+@@ -144,6 +146,12 @@ write_font_ascii_bitmap (FILE *file, FT_
+ 	return;
+       add_glyph (glyph_idx, face, char_code, &glyph);
+ 
++      if (glyph.bitmap == 0)
++        {
++          fprintf (stderr, "grub-gen-asciih: add_glyph not successful");
++          exit (1);
++        }
++
+       if (glyph.width == 8 && glyph.height == 16
+ 	  && glyph.x_ofs == 0 && glyph.y_ofs == 0)
+ 	{

meta/recipes-bsp/grub/grub_git.bb

@@ -22,6 +22,7 @@ SRC_URI = "git://git.savannah.gnu.org/grub.git \
            file://40_custom \
            file://autogen.sh-exclude-pc.patch \
            file://grub-2.00-add-oe-kernel.patch \
+           file://asciih-fix-build-warning-error.patch \
           "
 
 S = "${WORKDIR}/git"