Fixed compile error.

examples/common/nanovg/fontstash.h

@@ -410,7 +410,7 @@ struct FONScontext
 	void* errorUptr;
 };
 
-static void* fons__tmpalloc(size_t size, void* up)
+void* fons__tmpalloc(size_t size, void* up)
 {
 	unsigned char* ptr;
 
@@ -425,7 +425,7 @@ static void* fons__tmpalloc(size_t size, void* up)
 	return ptr;
 }
 
-static void fons__tmpfree(void* ptr, void* up)
+void fons__tmpfree(void* ptr, void* up)
 {
 	(void)ptr;
 	(void)up;

examples/common/nanovg/nanovg.cpp

@@ -18,6 +18,7 @@
 
 #include <stdio.h>
 #include <math.h>
+#include <stdlib.h>
 #include "nanovg.h"
 #define FONTSTASH_IMPLEMENTATION
 #include "fontstash.h"