fix dtrtrs_ and ztrtrs_ to accept case-insensitive parameters uplo and diag

Changes to be committed:
	modified:   interface/lapack/trtrs.c
	modified:   interface/lapack/ztrtrs.c

interface/lapack/trtrs.c

@@ -95,10 +95,12 @@ int NAME(char *UPLO, char* TRANS, char* DIAG, blasint *N, blasint *NRHS, FLOAT *
   if (trans_arg == 'R') trans = 0;
   if (trans_arg == 'C') trans = 1;
 
+  TOUPPER(uplo_arg);
   uplo = -1;
   if (uplo_arg == 'U') uplo = 0;
   if (uplo_arg == 'L') uplo = 1;
 
+  TOUPPER(diag_arg);
   diag = -1;
   if (diag_arg == 'U') diag = 0;
   if (diag_arg == 'N') diag = 1;

interface/lapack/ztrtrs.c

@@ -95,10 +95,12 @@ int NAME(char *UPLO, char* TRANS, char* DIAG, blasint *N, blasint *NRHS, FLOAT *
   if (trans_arg == 'R') trans = 2;
   if (trans_arg == 'C') trans = 3;
 
+  TOUPPER(uplo_arg);
   uplo = -1;
   if (uplo_arg == 'U') uplo = 0;
   if (uplo_arg == 'L') uplo = 1;
 
+  TOUPPER(diag_arg);
   diag = -1;
   if (diag_arg == 'U') diag = 0;
   if (diag_arg == 'N') diag = 1;