verify ghostscript alpha device

Author: Cristy

configure

@@ -5203,7 +5203,7 @@ MAGICK_PATCHLEVEL_VERSION=24
 
 MAGICK_VERSION=6.9.13-24
 
-MAGICK_GIT_REVISION=5f062bb31:20250309
+MAGICK_GIT_REVISION=25b191c20:20250316
 
 
 # Substitute library versioning
@@ -5237,7 +5237,7 @@ PACKAGE_LIB_VERSION=0x69D
 
 PACKAGE_LIB_VERSION_NUMBER=6,9,13,24
 
-PACKAGE_RELEASE_DATE=2025-03-09
+PACKAGE_RELEASE_DATE=2025-03-16
 
 
 # Ensure that make can run correctly
@@ -38027,6 +38027,8 @@ printf "%s\n" "$GSColorDevice" >&6; }
 printf %s "checking for gs alpha device... " >&6; }
     if $PSDelegate -q -dBATCH -sDEVICE=$GSAlphaDevice -sOutputFile=/dev/null < /dev/null 1>&5 2>&5; then
         :
+    elif $PSDelegate -q -dBATCH -sDEVICE=pngalpha -sOutputFile=/dev/null < /dev/null 1>&5 2>&5; then
+        GSAlphaDevice=pngalpha
     else
         GSAlphaDevice=$GSColorDevice
     fi

configure.ac

@@ -3644,6 +3644,8 @@ if test $have_gs = 'yes'; then
     AC_MSG_CHECKING([for gs alpha device])
     if $PSDelegate -q -dBATCH -sDEVICE=$GSAlphaDevice -sOutputFile=/dev/null < /dev/null 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
         :
+    elif $PSDelegate -q -dBATCH -sDEVICE=pngalpha -sOutputFile=/dev/null < /dev/null 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
+        GSAlphaDevice=pngalpha
     else
         GSAlphaDevice=$GSColorDevice
     fi