sbawe: fix memory detection part 2

The patch "sbawe: fix memory detection" fixed detection
for memoryless SB32 cards but broke detection of memory
above 512KB. This patch fixes the regression.

The patch has been tested on the SB32 card (CT3670) with
0MB, 2MB and 8MB memory installed.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/isa/sb/emu8000.c

@@ -377,12 +377,13 @@ init_arrays(struct snd_emu8000 *emu)
 static void __devinit
 size_dram(struct snd_emu8000 *emu)
 {
-	int i, size;
+	int i, size, detected_size;
 
 	if (emu->dram_checked)
 		return;
 
 	size = 0;
+	detected_size = 0;
 
 	/* write out a magic number */
 	snd_emu8000_dma_chan(emu, 0, EMU8000_RAM_WRITE);
@@ -393,6 +394,8 @@ size_dram(struct snd_emu8000 *emu)
 
 	while (size < EMU8000_MAX_DRAM) {
 
+		size += 512 * 1024;  /* increment 512kbytes */
+
 		/* Write a unique data on the test address.
 		 * if the address is out of range, the data is written on
 		 * 0x200000(=EMU8000_DRAM_OFFSET).  Then the id word is
@@ -414,7 +417,7 @@ size_dram(struct snd_emu8000 *emu)
 		if (EMU8000_SMLD_READ(emu) != UNIQUE_ID2)
 			break; /* no memory at this address */
 
-		size += 512 * 1024;  /* increment 512kbytes */
+		detected_size = size;
 
 		snd_emu8000_read_wait(emu);
 
@@ -442,9 +445,9 @@ size_dram(struct snd_emu8000 *emu)
 	snd_emu8000_dma_chan(emu, 1, EMU8000_RAM_CLOSE);
 
 	snd_printdd("EMU8000 [0x%lx]: %d Kb on-board memory detected\n",
-		    emu->port1, size/1024);
+		    emu->port1, detected_size/1024);
 
-	emu->mem_size = size;
+	emu->mem_size = detected_size;
 	emu->dram_checked = 1;
 }