configure: Move license checks directly after command line parsing

This will allow to error out immediately if incompatible options are
passed on the command line instead of running time-consuming tests.

configure

@@ -2767,6 +2767,17 @@ done
 
 disabled logging && logfile=/dev/null
 
+# Die early if licensing-related configure options are incompatible.
+die_license_disabled() {
+    enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
+}
+
+map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
+map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
+map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
+
+enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
+
 # Disable all the library-specific components if the library itself
 # is disabled, see AVCODEC_LIST and following _LIST variables.
 
@@ -4124,16 +4135,6 @@ EOF
     exit 1
 fi
 
-die_license_disabled() {
-    enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
-}
-
-map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST
-map "die_license_disabled nonfree"  $EXTERNAL_LIBRARY_NONFREE_LIST $HWACCEL_LIBRARY_NONFREE_LIST
-map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST
-
-enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
-
 disabled optimizations || check_cflags -fomit-frame-pointer
 
 enable_weak_pic() {