Move preprocessor condition before variable declaration, fixes the warning:

libswscale/swscale.c:1795: warning: unused variable 'flags'


git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@29287 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale.c

@@ -1792,9 +1792,9 @@ static void globalInit(void){
 
 static SwsFunc getSwsFunc(SwsContext *c)
 {
+#if CONFIG_RUNTIME_CPUDETECT && CONFIG_GPL
     int flags = c->flags;
 
-#if CONFIG_RUNTIME_CPUDETECT && CONFIG_GPL
 #if ARCH_X86
     // ordered per speed fastest first
     if (flags & SWS_CPU_CAPS_MMX2) {