silence compiler warnings

ChangeLog

@@ -1,3 +1,7 @@
+2011-02-19  Robert Larice
+ * src/frontend/numparam/mystring.c :
+    silence compiler warnings
+
 2011-02-19  Robert Larice
  * src/frontend/numparam/mystring.c ,
  * src/frontend/numparam/xpressn.c :

src/frontend/numparam/mystring.c

@@ -75,7 +75,7 @@ rs ( SPICE_DSTRINGPTR dstr_p)
     spice_dstring_reinit(dstr_p) ;
     do
     {
-        c = fgetc (stdin);
+        c = (char) fgetc (stdin);
         cadd (dstr_p, c);
     }
     while (!((c == '\r') || (c == '\n')));
@@ -592,7 +592,7 @@ freadstr (FILE * f, SPICE_DSTRINGPTR dstr_p)
     spice_dstring_reinit(dstr_p) ;
     do
     {
-        c = fgetc (f);		/*  tab is the only control char accepted */
+        c = (char) fgetc (f);	/*  tab is the only control char accepted */
         if (((c >= ' ') || (c < 0) || (c == '\t')))
         {
             str_load[0] = c;