[flang1] Fix an MIN/MAX intrinsic bug

Author: liuyunlong16

tools/flang1/flang1exe/semfunc.c

@@ -4164,41 +4164,44 @@ cmp_mod_scope(SPTR sptr)
  * or character and they shall all have the same kind type parameter.
  */
 void
-check_max_min_argument(int argdtype, int *dtype_new, int *dtype_last) {
+check_max_min_argument(int argdtype, int *dtype_last)
+{
+  int dtype_new = DT_NONE_GENERAL;
+
   switch (DTYG(argdtype)) {
     case TY_BINT:
     case TY_SINT:
     case TY_INT:
     case TY_INT8:
     case TY_WORD:
     case TY_DWORD:
-      *dtype_new = DT_INT_GENERAL;
+      dtype_new = DT_INT_GENERAL;
       break;
     case TY_HALF:
     case TY_REAL:
     case TY_DBLE:
     case TY_QUAD:
-      *dtype_new = DT_REAL_GENERAL;
+      dtype_new = DT_REAL_GENERAL;
       break;
     case TY_CHAR:
     case TY_NCHAR:
-      *dtype_new = DT_CHAR_GENERAL;
+      dtype_new = DT_CHAR_GENERAL;
       break;
     default:
-      *dtype_new = DT_NONE_GENERAL;
+      dtype_new = DT_NONE_GENERAL;
       break;
   }
   if (*dtype_last == 0)
-    *dtype_last = *dtype_new;
+    *dtype_last = dtype_new;
 
-  if (*dtype_new == DT_NONE_GENERAL) {
+  if (dtype_new == DT_NONE_GENERAL) {
     error(155, 3, gbl.lineno,
           "Arguments must be INTEGER, REAL, or CHARACTER!", CNULL);
-  } else if (*dtype_new != *dtype_last) {
+  } else if (dtype_new != *dtype_last) {
     error(155, 3, gbl.lineno,
            "Arguments must have the same kind type parameter!", CNULL);
   } else {
-    *dtype_last = *dtype_new;
+    *dtype_last = dtype_new;
   }
 }
 
@@ -4228,7 +4231,6 @@ ref_intrin(SST *stktop, ITEM *list)
   int tmp, tmp_ast;
   FtnRtlEnum rtlRtn;
   int intrin; /* one of the I_* constants */
-  int dtype_new = 0;
   int dtype_last = 0;
   int maxtype = 0;
 
@@ -4319,7 +4321,7 @@ ref_intrin(SST *stktop, ITEM *list)
     }
 
     if (intrin == I_MAX || intrin == I_MIN) {
-      check_max_min_argument(argdtype, &dtype_new, &dtype_last);
+      check_max_min_argument(argdtype, &dtype_last);
     }
 
     if (!dtype1) {