mesa: fix parameter counting in ARB vertex/fragment program parsing

Duplicated unnamed constants were getting counted more than once.
diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index 6ef09fd..35253da 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -1840,7 +1840,6 @@
                if (param_var->param_binding_begin == ~0U)
                   param_var->param_binding_begin = idx;
                param_var->param_binding_length++;
-               Program->Base.NumParameters++;
             }
          }
          else {
@@ -1849,7 +1848,6 @@
             if (param_var->param_binding_begin == ~0U)
                param_var->param_binding_begin = idx;
             param_var->param_binding_length++;
-            Program->Base.NumParameters++;
          }
          break;
 
@@ -1860,7 +1858,6 @@
          if (param_var->param_binding_begin == ~0U)
             param_var->param_binding_begin = idx;
          param_var->param_binding_length++;
-         Program->Base.NumParameters++;
 
          /* Check if there is more: 0 -> we're done, else its an integer */
          if (**inst) {
@@ -1896,7 +1893,6 @@
                idx = _mesa_add_state_reference(Program->Base.Parameters,
                                                state_tokens);
                param_var->param_binding_length++;
-               Program->Base.NumParameters++;
             }
          }
          else {
@@ -1918,7 +1914,6 @@
           * instruction register type appropriately.
           */
          param_var->param_binding_length++;
-         Program->Base.NumParameters++;
          break;
 
       default:
@@ -1927,6 +1922,8 @@
          return 1;
    }
 
+   Program->Base.NumParameters = Program->Base.Parameters->NumParameters;
+
    /* Make sure we haven't blown past our parameter limits */
    if (((Program->Base.Target == GL_VERTEX_PROGRAM_ARB) &&
         (Program->Base.NumParameters >