afl-as-AFL_INST_RATIO.diff

--- afl-as.c.old	2018-02-11 22:05:48.636563804 +0100
+++ afl-as.c	2018-02-11 22:07:04.035919083 +0100
@@ -525,7 +525,8 @@ int main(int argc, char** argv) {
 
   if (getenv("AFL_USE_ASAN") || getenv("AFL_USE_MSAN")) {
     sanitizer = 1;
-    inst_ratio /= 3;
+    if (!getenv("AFL_INST_RATIO"))
+      inst_ratio /= 3;
   }
 
   if (!just_version) add_instrumentation();