GraphicsMagick: ReadBMPImage(): Fix GCC 13.1.0 warning about qua...

changeset f16afdc154d1 in /hg/GraphicsMagick
details: http://hg.GraphicsMagick.org/hg/GraphicsMagick?cmd=changeset;node=f16afdc154d1
summary: ReadBMPImage(): Fix GCC 13.1.0 warning about quantum_bits being possibly used while uninitialized.

diffstat:

 ChangeLog          |  5 +++++
 coders/bmp.c       |  4 ++--
 www/Changelog.html |  4 ++++
 3 files changed, 11 insertions(+), 2 deletions(-)

diffs (49 lines):

diff -r d2658922fcc7 -r f16afdc154d1 ChangeLog
--- a/ChangeLog	Sat Aug 05 08:03:47 2023 -0500
+++ b/ChangeLog	Sat Aug 05 11:42:46 2023 -0500
@@ -1,5 +1,10 @@
 2023-08-05  Bob Friesenhahn  <[email protected]>
 
+	* coders/bmp.c (ReadBMPImage): Fix GCC 13.1.0 warning about
+	quantum_bits being possibly used while uninitialized.  I don't see
+	how that is possible based on current logic, but avoid the
+	warning.
+
 	* magick/gem.c (ExpandAffine): Mark as a pure function.
 
 2023-07-31  Bob Friesenhahn  <[email protected]>
diff -r d2658922fcc7 -r f16afdc154d1 coders/bmp.c
--- a/coders/bmp.c	Sat Aug 05 08:03:47 2023 -0500
+++ b/coders/bmp.c	Sat Aug 05 11:42:46 2023 -0500
@@ -1218,6 +1218,8 @@
     image->units=PixelsPerCentimeterResolution;
     image->x_resolution=bmp_info.x_pixels/100.0;
     image->y_resolution=bmp_info.y_pixels/100.0;
+    (void) memset(&quantum_bits,0,sizeof(PixelPacket));
+    (void) memset(&shift,0,sizeof(PixelPacket));
     /*
       Convert BMP raster image to pixel packets.
     */
@@ -1245,8 +1247,6 @@
         /*
           Get shift and quantum bits info from bitfield masks.
         */
-        (void) memset(&shift,0,sizeof(PixelPacket));
-        (void) memset(&quantum_bits,0,sizeof(PixelPacket));
         if (bmp_info.red_mask != 0U)
           while ((shift.red < 32U) && (((bmp_info.red_mask << shift.red) & 0x80000000U) == 0))
             shift.red++;
diff -r d2658922fcc7 -r f16afdc154d1 www/Changelog.html
--- a/www/Changelog.html	Sat Aug 05 08:03:47 2023 -0500
+++ b/www/Changelog.html	Sat Aug 05 11:42:46 2023 -0500
@@ -40,6 +40,10 @@
 <p>2023-08-05  Bob Friesenhahn  &lt;<a class="reference external" href="mailto:bfriesen&#37;&#52;&#48;simple&#46;dallas&#46;tx&#46;us">bfriesen<span>&#64;</span>simple<span>&#46;</span>dallas<span>&#46;</span>tx<span>&#46;</span>us</a>&gt;</p>
 <blockquote>
 <ul class="simple">
+<li><p>coders/bmp.c (ReadBMPImage): Fix GCC 13.1.0 warning about
+quantum_bits being possibly used while uninitialized.  I don't see
+how that is possible based on current logic, but avoid the
+warning.</p></li>
 <li><p>magick/gem.c (ExpandAffine): Mark as a pure function.</p></li>
 </ul>
 </blockquote>