Fixed compiler warnings.

stringbuffer_glue.c

@@ -205,6 +205,7 @@ int bmx_stringbuffer_endswith(struct MaxStringBuffer * buf, BBString * subString
 	if (subString->length <= buf->count) {
 		return bmx_stringbuffer_matches(buf, buf->count - subString->length, subString);
 	}
+	return 0;
 }
 
 int bmx_stringbuffer_find(struct MaxStringBuffer * buf, BBString * subString, int startIndex) {

waitpid.c

@@ -5,6 +5,7 @@
 #include <sys/wait.h>
 #include <errno.h>
 #include <sys/types.h>
+#include <unistd.h>
 #endif
 
 int bmx_system(const char * c) {