configure.ac: Remove space after indent -T flag.

Fixes this build error on platforms not using GNU indent.

indent: Command line: ``-T'' requires a parameter

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
diff --git a/configure.ac b/configure.ac
index 3b84b1c..1414ce8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -73,7 +73,7 @@
 
 AC_CHECK_PROG(INDENT, indent, indent, cat)
 if test "x$INDENT" != "xcat"; then
-    AC_SUBST(INDENT_FLAGS, '-i4 -nut -br -brs -npcs -ce -T GLubyte -T GLbyte -T Bool')
+    AC_SUBST(INDENT_FLAGS, '-i4 -nut -br -brs -npcs -ce -TGLubyte -TGLbyte -TBool')
 fi
 
 dnl Our fallback install-sh is a symlink to minstall. Use the existing