ARB prog parser: Revert part of previous change to constant parsing

The commit "ARP prog parser: Implement the spec, not what makes sense"
broke the parsing of scalar constants.  This commit reverts that part
of that commit.  Now vp_swizzle.c passes.
diff --git a/src/mesa/shader/program_parse.y b/src/mesa/shader/program_parse.y
index b4ba5b0..89e8850 100644
--- a/src/mesa/shader/program_parse.y
+++ b/src/mesa/shader/program_parse.y
@@ -1641,19 +1641,19 @@
 
 paramConstScalarUse: REAL
 	{
-	   $$.count = 4;
+	   $$.count = 1;
 	   $$.data[0] = $1;
-	   $$.data[1] = 0.0f;
-	   $$.data[2] = 0.0f;
-	   $$.data[3] = 1.0f;
+	   $$.data[1] = $1;
+	   $$.data[2] = $1;
+	   $$.data[3] = $1;
 	}
 	| INTEGER
 	{
-	   $$.count = 4;
+	   $$.count = 1;
 	   $$.data[0] = (float) $1;
-	   $$.data[1] = 0.0f;
-	   $$.data[2] = 0.0f;
-	   $$.data[3] = 1.0f;
+	   $$.data[1] = (float) $1;
+	   $$.data[2] = (float) $1;
+	   $$.data[3] = (float) $1;
 	}
 	;