fix --disable-ffplay should disable any needs to check or add compile…

…/link flags otherwise SDL gets spewed all over pkg-config files and generally causes a mess

configure

@@ -4827,22 +4827,24 @@ if enabled libdc1394; then
     die "ERROR: No version of libdc1394 found "
 fi
 
-SDL_CONFIG="${cross_prefix}sdl-config"
-if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
-    check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
-    check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
-    enable sdl
-else
-  if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
-    sdl_cflags=$("${SDL_CONFIG}" --cflags)
-    sdl_libs=$("${SDL_CONFIG}" --libs)
-    check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
-    check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
-    check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
-    enable sdl
-  fi
+if enabled ffplay; then
+    SDL_CONFIG="${cross_prefix}sdl-config"
+    if check_pkg_config sdl SDL_events.h SDL_PollEvent; then
+        check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
+        check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
+        enable sdl
+    else
+      if "${SDL_CONFIG}" --version > /dev/null 2>&1; then
+        sdl_cflags=$("${SDL_CONFIG}" --cflags)
+        sdl_libs=$("${SDL_CONFIG}" --libs)
+        check_func_headers SDL_version.h SDL_Linked_Version $sdl_cflags $sdl_libs &&
+        check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x010201" $sdl_cflags &&
+        check_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x010300" $sdl_cflags &&
+        enable sdl
+      fi
+    fi
+    enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
 fi
-enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs
 
 texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
 makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo