From ff01781f6cdada33c6545c0f9c8601e9e7336284 Mon Sep 17 00:00:00 2001
From: JuliooCesarMDM <juliomatias123@outlook.com>
Date: Sun, 15 Aug 2021 18:46:39 -0300
Subject: [PATCH] Safe SquareRoot

---
 src/main/common/maths.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/main/common/maths.c b/src/main/common/maths.c
index a99c3f346b..4a07f7a8ef 100644
--- a/src/main/common/maths.c
+++ b/src/main/common/maths.c
@@ -524,11 +524,15 @@ float bellCurve(const float x, const float curveWidth)
 }
 
 float fast_fsqrtf(const double value) {
+    float ret = 0.0f;
 #ifdef USE_ARM_MATH
-    float squirt;
-    arm_sqrt_f32(value, &squirt);
-    return squirt;
+    arm_sqrt_f32(value, &ret);
 #else 
-    return sqrtf(value);
+    ret = sqrtf(value);
 #endif
+    if (isnan(ret))
+    {
+        return 0;
+    }
+    return ret;
 }
\ No newline at end of file