Fix all the defects identified by Clang Static Analyzer

Some fixes are dirty, but it is a start to enforce scan-build on
every commit.

Signed-off-by: pscott <scott.piriou@ledger.fr>

src/stark_crypto.c

@@ -81,7 +81,7 @@ void stark_get_amount_string(uint8_t *contractAddress,
     mul256(&amountPre, &quantum, &amount);
     tostring256(&amount, 10, tmp100, 100);
     PRINTF("stark_get_amount_string - mul256 %s\n", tmp100);
-    strcpy(target100, ticker);
+    strlcpy(target100, ticker, 100);
     adjustDecimals(tmp100, strlen(tmp100), target100 + strlen(ticker), 100, decimals);
     PRINTF("get_amount_string %s\n", target100);
 }