r750: check puts() return (#132 & #103)

misc.c

@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include "mmpriv.h"
 
 int mm_verbose = 1;
@@ -120,6 +121,16 @@ double realtime(void)
 	return tp.tv_sec + tp.tv_usec * 1e-6;
 }
 
+void mm_err_puts(const char *str)
+{
+	int ret;
+	ret = puts(str);
+	if (ret == EOF) {
+		fprintf(stderr, "[ERROR] failed to write the results\n");
+		exit(EXIT_FAILURE);
+	}
+}
+
 #include "ksort.h"
 
 #define sort_key_128x(a) ((a).x)