Fix cast warning with g++.

Author: dgarske

src/tpm2.c

@@ -5355,7 +5355,7 @@ int TPM2_GetName(TPM2_CTX* ctx, UINT32 handleValue, int handleCnt, int idx, TPM2
 
 void TPM2_SetupPCRSel(TPML_PCR_SELECTION* pcr, TPM_ALG_ID alg, int pcrIndex)
 {
-    if (pcr && pcrIndex >= PCR_FIRST && pcrIndex <= PCR_LAST) {
+    if (pcr && pcrIndex >= (int)PCR_FIRST && pcrIndex <= (int)PCR_LAST) {
         pcr->count = 1;
         pcr->pcrSelections[0].hash = alg;
         pcr->pcrSelections[0].sizeofSelect = PCR_SELECT_MIN;

src/tpm2_wrap.c

@@ -2512,7 +2512,7 @@ int wolfTPM2_ReadPCR(WOLFTPM2_DEV* dev, int pcrIndex, int hashAlg, byte* digest,
     PCR_Read_Out pcrReadOut;
     int digestLen = 0;
 
-    if (dev == NULL || pcrIndex < PCR_FIRST || pcrIndex > PCR_LAST)
+    if (dev == NULL || pcrIndex < (int)PCR_FIRST || pcrIndex > (int)PCR_LAST)
         return BAD_FUNC_ARG;
 
     /* set session auth to blank */