fix some compiler warnings

src/Lib/TriangleJRS/test_triangle.c

@@ -1,5 +1,6 @@
 /* a test of the Shewchuk triangulator (lib form) */
 
+#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 

src/Lib/poly2tri/construct.c

@@ -1,5 +1,6 @@
 #include "triangulate.h"
 #include <math.h>
+#include <string.h>
 
 #ifdef _MSC_VER
 #  include <memory.h>

src/Lib/poly2tri/monotone.c

@@ -1,5 +1,6 @@
 #include "triangulate.h"
 #include <math.h>
+#include <string.h>
 #ifdef _MSC_VER
 #  include <memory.h>
 #endif

src/Lib/poly2tri/tri.c

@@ -1,4 +1,5 @@
 #include "triangulate.h"
+#include <string.h>
 /* #include <sys/time.h> */
 #ifdef _MSC_VER
 #  include <memory.h>

src/Lib/shapelib/shpcreate.c

@@ -51,6 +51,7 @@
 static char rcsid[] = 
   "$Id: shpcreate.c,v 1.5 2002/01/15 14:36:07 warmerda Exp $";
 
+#include <stdlib.h>
 #include "shapefil.h"
 
 int main( int argc, char ** argv )

src/Lib/shapelib/shpdump.c

@@ -67,6 +67,7 @@
 static char rcsid[] = 
   "$Id: shpdump.c,v 1.10 2002/04/10 16:59:29 warmerda Exp $";
 
+#include <stdlib.h>
 #include "shapefil.h"
 
 int main( int argc, char ** argv )

src/Lib/shapelib/shputils.c

@@ -79,6 +79,7 @@
 static char rcsid[] = 
   "$Id: shputils.c,v 1.7 2003/02/25 17:20:22 warmerda Exp $";
 
+#include <stdlib.h>
 #include "shapefil.h"
 #include "string.h"
 #ifndef FALSE