mesa: casts to silence new warnings from printf()
diff --git a/src/mesa/shader/prog_print.c b/src/mesa/shader/prog_print.c
index a933f21..b4905ab 100644
--- a/src/mesa/shader/prog_print.c
+++ b/src/mesa/shader/prog_print.c
@@ -603,7 +603,7 @@
 
    switch (inst->Opcode) {
    case OPCODE_PRINT:
-      fprintf(f, "PRINT '%s'", inst->Data);
+      fprintf(f, "PRINT '%s'", (char *) inst->Data);
       if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
          fprintf(f, ", ");
          fprintf(f, "%s[%d]%s",