Merge pull request #312 from eli-schwartz/quoting

fix quoting of m4_fatal

m4/ax_check_gl.m4

@@ -85,7 +85,7 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 23
+#serial 24
 
 # example gl program
 m4_define([_AX_CHECK_GL_PROGRAM],
@@ -187,7 +187,7 @@ AC_DEFUN([_AX_CHECK_GL_LINK_CV],
 AC_DEFUN([_AX_CHECK_GL_MANUAL_LIBS_GENERIC], [
   AS_IF([test -n "$GL_LIBS"],[], [
     ax_check_gl_manual_libs_generic_extra_libs="$1"
-    m4_if($1, [], m4_fatal([$0: argument must not be empty]))
+    m4_if($1, [], [m4_fatal([$0: argument must not be empty])])
 
     _AX_CHECK_GL_SAVE_FLAGS([CFLAGS])
     AC_SEARCH_LIBS([glBegin],[$ax_check_gl_manual_libs_generic_extra_libs], [

m4/ax_check_glx.m4

@@ -61,7 +61,7 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 9
+#serial 10
 
 # example program
 m4_define([_AX_CHECK_GLX_PROGRAM],
@@ -183,7 +183,7 @@ AC_DEFUN([_AX_CHECK_GLX_HEADERS],
 AC_DEFUN([_AX_CHECK_GLX_MANUAL_LIBS_GENERIC],
 [dnl
  ax_check_glx_manual_libs_generic_extra_libs="$1"
- m4_if($1, [], m4_fatal([$0: argument must not be empty]))
+ m4_if($1, [], [m4_fatal([$0: argument must not be empty])])
 
  AC_LANG_PUSH([C])
  _AX_CHECK_GLX_SAVE_FLAGS()

m4/ax_switch_flags.m4

@@ -36,10 +36,10 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 5
+#serial 6
 
 AC_DEFUN([AX_SWITCH_FLAGS], [
-  m4_if($1, [], m4_fatal([$0: namespace is empty]))
+  m4_if($1, [], [m4_fatal([$0: namespace is empty])])
   AC_REQUIRE(AX_SAVE_FLAGS)
   AC_REQUIRE(AX_RESTORE_FLAGS)
   AX_SAVE_FLAGS($1[])