SDL2: When cross compiling to 32-bit do not use sdl2-config

build-debug-sdl2

@@ -4,6 +4,7 @@
 if [ "$1" == "32" ]; then
     export CC=`which gcc`" -m32"
     export CXX=`which g++`" -m32"
+    no_host_sdl2=1
     shift
     opt="--host=i686-pc-linux-gnu --target=i686-pc-linux-gnu"
 fi
@@ -17,7 +18,11 @@ fi
 chmod +x vs2015/sdl/build-scripts/strip_fPIC.sh
 
 # prefer to compile against our own copy of SDL 2.x IF the system does not provide one
-x=`which sdl2-config`
+if [[ "$no_host_sdl2" ]]; then
+    x= # doesn't work well cross-compiling
+else
+    x=`which sdl2-config`
+fi
 if test -z "$x" ; then
     echo Compiling our internal SDL 2.x
     (cd vs2015/sdl2 && ./build-dosbox.sh) || exit 1