Merge #21: Add fix for RELIC parsing invalid inputs.

adb7110 Add fix for RELIC parsing invalid inputs. (Fuzzbawls)

Pull request description:

  This patch handles RELIC errors when invalid inputs are provided.

  Ref: Chia-Network#249

  Extracted From: #12

ACKs for top commit:
  panleone:
    utACK adb7110
  Liquid369:
    ACK adb7110

Tree-SHA512: 8e9bbf2c4444055c63b17ee9311571ed74ca5c527cc48c49e374c9dd404423383426f0b2bc0aeccf6995d9bd40deb8538f8d7d7429aef4e4d0d9cc6372c9174a

src/elements.cpp

@@ -58,6 +58,7 @@ G1Element G1Element::FromBytes(const Bytes& bytes)
         }
     }
     g1_read_bin(ele.p, buffer, G1Element::SIZE + 1);
+    BLS::CheckRelicErrors();
     ele.CheckValid();
     return ele;
 }
@@ -241,6 +242,7 @@ G2Element G2Element::FromBytes(const Bytes& bytes)
     }
 
     g2_read_bin(ele.q, buffer, G2Element::SIZE + 1);
+    BLS::CheckRelicErrors();
     ele.CheckValid();
     return ele;
 }