Merged the patch submitted by Tamas Nepusz to fix some problems on Mac OS X.

ChangeLog

@@ -2,6 +2,7 @@
 
 	* libLBFGS 1.10:
 	- Fixed compiling errors on Mac OS X; this patch was kindly submitted by Nic Schraudolph.
+	- Reduced compiling warnings on Mac OS X; this patch was kindly submitted by Tamas Nepusz.
 
 
 2010-01-29  Naoaki Okazaki  <okazaki at chokkan org>

include/lbfgs.h

@@ -601,6 +601,8 @@ libLBFGS is distributed under the term of the
 - Version 1.10 (2010-xx-xx):
     - Fixed compiling errors on Mac OS X; this patch was kindly submitted by
       Nic Schraudolph.
+    - Reduced compiling warnings on Mac OS X; this patch was kindly submitted
+      by Tamas Nepusz.
 - Version 1.9 (2010-01-29):
     - Fixed a mistake in checking the validity of the parameters "ftol" and
       "wolfe"; this was discovered by Kevin S. Van Horn.
@@ -721,7 +723,7 @@ Special thanks go to:
     - Yoshimasa Tsuruoka and Daisuke Okanohara for technical information about
       OWL-QN
     - Takashi Imamichi for the useful enhancements of the backtracking method
-    - Kevin S. Van Horn and Nic Schraudolph for bug fixes
+    - Kevin S. Van Horn, Nic Schraudolph, and Tamas Nepusz for bug fixes
 
 Finally I would like to thank the original author, Jorge Nocedal, who has been
 distributing the effieicnt and explanatory implementation in an open source

lib/lbfgs.c

@@ -65,6 +65,7 @@ licence.
 #include <config.h>
 #endif/*HAVE_CONFIG_H*/
 
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
@@ -73,7 +74,6 @@ licence.
 
 #ifdef  _MSC_VER
 #define inline  __inline
-typedef unsigned int uint32_t;
 #endif/*_MSC_VER*/
 
 #if     defined(USE_SSE) && defined(__SSE2__) && LBFGS_FLOAT == 64
@@ -290,7 +290,7 @@ int lbfgs(
     if (n % 8 != 0) {
         return LBFGSERR_INVALID_N_SSE;
     }
-    if (((unsigned short)x & 0x000F) != 0) {
+    if ((uintptr_t)(const void*)x % 16 == 0) {
         return LBFGSERR_INVALID_X_SSE;
     }
 #endif/*defined(USE_SSE)*/
@@ -490,7 +490,7 @@ int lbfgs(
 
         /* Report the progress. */
         if (cd.proc_progress) {
-            if (ret = cd.proc_progress(cd.instance, x, g, fx, xnorm, gnorm, step, cd.n, k, ls)) {
+            if ((ret = cd.proc_progress(cd.instance, x, g, fx, xnorm, gnorm, step, cd.n, k, ls))) {
                 goto lbfgs_exit;
             }
         }