Fix fpos_t configure test, allowing this to build on netbsd-6.

PR 46412.

XXX: I'm not convinced the results will actually *work*. If anyone
XXX: knows how to check this, please do.

math/capc-calc/distinfo

@@ -1,6 +1,7 @@
-$NetBSD: distinfo,v 1.23 2011/04/05 17:18:14 drochner Exp $
+$NetBSD: distinfo,v 1.24 2012/05/07 19:57:17 dholland Exp $
 
 SHA1 (calc-2.12.4.1.tar.bz2) = b64eae89de2167f439f52b4005bbc4e5dfc0d6fb
 RMD160 (calc-2.12.4.1.tar.bz2) = 68fe6352b6a1b58e53d7cb4b4f51c596aa8539f7
 Size (calc-2.12.4.1.tar.bz2) = 865856 bytes
 SHA1 (patch-aa) = 65da8569bb74647ef01bfc389690d631d161ab96
+SHA1 (patch-fposval_c) = 8a8d08f8b566e583faa3bd9033c4a9ac90cb343c

math/capc-calc/patches/patch-fposval_c

@@ -0,0 +1,16 @@
+$NetBSD: patch-fposval_c,v 1.1 2012/05/07 19:57:17 dholland Exp $
+
+Avoid generating incorrect code that leads to a build failure on
+NetBSD 6+.
+
+--- fposval.c~	2007-09-19 22:35:23.000000000 +0000
++++ fposval.c
+@@ -129,7 +129,7 @@ main(int argc, char **argv)
+ 	 * systems a FILEPOS is not a scalar hince we must memcpy.
+ 	 */
+ 	printf("#define SWAP_HALF_IN_FILEPOS(dest, src)\t%s\n",
+-	    "memcpy((void *)(dest), (void *)(src), sizeof(FPOS_POS_LEN))");
++	    "memcpy((void *)(dest), (void *)(src), FILEPOS_LEN)");
+ #endif /* HAVE_FILEPOS_SCALAR */
+ #endif /* CALC_BYTE_ORDER == BIG_ENDIAN */
+ 	putchar('\n');