cxmisc.h depends on cvconfig.h, breaks non-GCC builds (Bug #329)

cxmisc.h includes the following:

/* get alloca declaration */
#ifdef +GNUC+
    #undef alloca
    #define alloca +builtin_alloca
#elif defined WIN32 || defined _WIN32 || defined WIN64 || defined _WIN64 || \
      defined WINCE || defined _MSC_VER || defined +BORLANDC+
    #include <malloc.h>
#elif defined HAVE_ALLOCA_H
    #include <alloca.h>
#elif defined HAVE_ALLOCA
    #include <stdlib.h>
#else
    #error "No alloca!" 
#endif

I am mitigating this problem with this workaround:
<pre>
<code class="diff">
--- a/include/opencv/cxmisc.h    2010-04-05 21:24:40.000000000 -0400
+++ b/include/opencv/cxmisc.h    2010-05-08 17:25:25.852393994 -0400
@@ -50,6 +50,10 @@

 #include <limits.h>

+#ifdef HAVE_CONFIG_H
+    #include <cvconfig.h>
+#endif
+
 /****************************************************************************************\
*                              Compile-time tuning parameters                            *
 \****************************************************************************************/
</code>