fix for 151236

Original commit message from CVS:
fix for 151236

ChangeLog

@@ -1,5 +1,15 @@
 2004-08-30  Thomas Vander Stichele  <thomas at apestaart dot org>
 
+	Patch by: David Schleef
+
+	* configure.ac:
+	* sys/Makefile.am:
+	  rename our detection macro for V4L2.  Fixes #151236.
+
+2004-08-30  Thomas Vander Stichele  <thomas at apestaart dot org>
+
+	Patch by: David Schleef
+
 	* configure.ac:
 	  check to define LAMEPRESET.  Fixes #151232.
 

configure.ac

@@ -675,8 +675,8 @@ GST_CHECK_FEATURE(V4L, [Video 4 Linux], v4lsrc v4lmjpegsrc v4lmjpegsink, [
 dnl *** Video 4 Linux 2 ***
 dnl for information about the header/define, see sys/v4l2/gstv4l2element.h
 translit(dnm, m, l) AM_CONDITIONAL(USE_V4L2, true)
-GST_CHECK_FEATURE(V4L2, [Video 4 Linux 2], v4l2src, [
-  HAVE_V4L2="no"
+GST_CHECK_FEATURE(GST_V4L2, [Video 4 Linux 2], v4l2src, [
+  HAVE_GST_V4L2="no"
   if test "$HAVE_X" = "yes"
   then
     AC_MSG_CHECKING([Checking for uptodate v4l2 installation])
@@ -690,15 +690,15 @@ GST_CHECK_FEATURE(V4L2, [Video 4 Linux 2], v4l2src, [
 #endif
     ], [
 return 0;
-    ], [ HAVE_V4L2="yes" && AC_MSG_RESULT(yes)],
-       [ HAVE_V4L2="no"  && AC_MSG_RESULT(no) &&
+    ], [ HAVE_GST_V4L2="yes" && AC_MSG_RESULT(yes)],
+       [ HAVE_GST_V4L2="no"  && AC_MSG_RESULT(no) &&
          AC_CHECK_HEADER(linux/videodev2.h,
                          [ AC_MSG_WARN([video4linux2 headers were found, but they're old. Please update v4l2 to compile the v4l2 plugins])],
                          [ AC_MSG_WARN([video4linux2 was not found])])
        ])
   fi
   dnl check for missing v4l2_buffer declaration (see #135919)
-  if [ test x$HAVE_V4L2 = xyes ]; then
+  if [ test x$HAVE_GST_V4L2 = xyes ]; then
     MISSING_DECL=0
     AC_MSG_CHECKING(struct v4l2_buffer declaration)
     AC_TRY_COMPILE([

sys/Makefile.am

@@ -40,7 +40,7 @@ else
 V4L_DIR=
 endif
 
-if USE_V4L2
+if USE_GST_V4L2
 V4L2_DIR=v4l2
 else
 V4L2_DIR=